First Cyanobacteria Warnings of 2024 Issued for Lake Winnipesaukee

[Lake Winnipesaukee Assoc]

Yesterday, the New Hampshire Department of Environmental Services (NHDES) issued the first Cyanobacteria Warnings (previously Advisories) on Lake Winnipesaukee for 2024. The initial total cyanobacteria density for the sample collected at Nineteen Mile Beach was 561,000 cells/mL and density for Carry Beach was 160,000 cells/mL. Warnings are implemented when cell counts exceed 70,000 cells/mL. The taxa Dolichospermum was identified in both samples, and Aphanothece was also found in the Nineteen Mile Bay sample.

To stay up to date on these warnings, I highly suggest that you sign up for NHDES Waterbody Specific Notifications. You can check the status of the warnings and alerts using the Healthy Swimming Mapper. We will be updating the LWA Cyanobacteria page and tracking map this week. If you suspect a bloom, please use the NHDES Reporting Tool and contact LWA. The blooms in Wolfeboro are described as "thick green material mixed with swirls of yellow pollen along the shoreline." The Tuftonboro blooms are described as "green clouds thoroughly mixed into the water on the shoreline." All samples had pollen mixed in. Any surface scum should be avoided, especially if the material is green.


There are numerous factors that play into when and where cyanobacteria blooms occur and it is almost impossible to point directly to one source. Cyanobacteria feed on nutrients and sunlight. Limited ice in, fertilizer use, polluted stormwater runoff, erosion, and failing septic systems are just a few of these factors. Less ice = more sunlight, more sunlight = increased plant/algae growth.

How can you help? LWA works on Watershed Management Plans throughout the watershed by Bay, identifying sites in need of remediation (failing culverts, lacking vegetation, poor maintenance etc.) on public property. Private property owners can do their part to adopt Lake-Friendly practices like retrofitting drains that empty directly into the lake, taking proper care of their septic systems, stopping fertilizer usage (especially those containing phosphates), pick up their pet waste, break up their lawn with native plantings, and designate walking paths to minimize soil compaction that leads to erosion. Please visit www.winnipesaukee.org for more info on how you can do your part to minimize excessive nutrients from entering the lake.


Stay safe!
Bree Rossiter
Conservation Program Manager

[ApS]

Hmmm.

The same waters where lawns are mowed--especially on Thursdays.

[tis]

Originally Posted by ApS

Hmmm.

The same waters where lawns are mowed--especially on Thursdays.

Where are you talking about?

[ApS]

Both Tuftonboro- and Wolfeboro- Neck waters.

[dickiej]

Originally Posted by tis

Where are you talking about?

Green lawn means fertilizer which causes Cyanobacteria

[ishoot308]

Looks like pollen to me…

Dan

[WinnisquamZ]

Originally Posted by ishoot308

Looks like pollen to me…

Dan

Agree. Its pollen. We got the same warning over here on Winnisquam


Sent from my iPhone using Winnipesaukee Forum mobile app

[ApS]

Originally Posted by ishoot308

Looks like pollen to me…Dan

My first thought...

but...

[FlyingScot]

Originally Posted by ishoot308

Looks like pollen to me…

Dan

That's a limitation of the photography, unfortunately, you need to read the fine print. According to the lab testing, the cyanobacteria is the green mass underneath the pollen.

[WinnisquamZ]

This happens every year since I have been coming to the lake. That would be around 1968. Just not sure what the issue is


Sent from my iPhone using Winnipesaukee Forum mobile app

[SAB1]

Originally Posted by WinnisquamZ

This happens every year since I have been coming to the lake. That would be around 1968. Just not sure what the issue is


Sent from my iPhone using Winnipesaukee Forum mobile app

Did you read the above? Look at the counts? Pretty big issue. You should attend meetings on this subject.

[tis]

Originally Posted by ishoot308

Looks like pollen to me…

Dan

i thought that too.

[WinnisquamZ]

Originally Posted by SAB1

Did you read the above? Look at the counts? Pretty big issue. You should attend meetings on this subject.

Bull. Nothing but a money grab. There is nothing that can be done to avoid it from happening. It’s natural


Sent from my iPhone using Winnipesaukee Forum mobile app

[Charlie T]

Originally Posted by dickiej

Green lawn means fertilizer which causes Cyanobacteria

I would expect Saunders Bay, Smith Cove and the areas around Governors Island to have problems soon. Plenty of huge, green lawns in all those areas. What are people thinking? It's the lake, not a Golf course

[gillygirl]

Originally Posted by WinnisquamZ

Bull. Nothing but a money grab. There is nothing that can be done to avoid it from happening. It’s natural


Sent from my iPhone using Winnipesaukee Forum mobile app

Many cases are anthropogenic. Sorry if it doesn’t fit your narrative that man isn’t having deleterious effects on the planet, but we are.


Sent from my iPad using Winnipesaukee Forum mobile app

[WinnisquamZ]

Originally Posted by gillygirl

Many cases are anthropogenic. Sorry if it doesn’t fit your narrative that man isn’t having deleterious effects on the planet, but we are.


Sent from my iPad using Winnipesaukee Forum mobile app

But you are allowed to blame man for all of earths problems. Believe you are the only one here with a agenda


Sent from my iPhone using Winnipesaukee Forum mobile app

[4 for Boating]

So I understand and agree that run off causes issues and there are more than a few homes that for whatever reason were allowed to take waterfront trees down and put in lawns but regarding fertilizer in particular - to say that the homeowners are solely responsible for this aspect (if it is in fact happening and causing these issues) would be overlooking local landscaping firms/businesses that actually do the work and would or should know better.

[John Mercier]

I believe there is a law and some cert/licensing requirements within a certain zone, but the run-off can come from a lot farther away than just the property right on the lake. But it is more likely a combination of several things and that it doesn't ''flush out'' of the lake that easy.

What they are noting is the phosphorous levels are higher than the natural background.

I believe the alum treatment is to lock that phosphorous into the lake bottom. I think it combines and settles out.

[SAB1]

Correct. There are many causes to the problem. Fertilizers are just one issue.

[tis]

Geez people. I am tired of blaming it all on fertilizer. We have a flat lot and grass and we haven't fertilized it for years. It is very green. I agree with Winnisquam, and I read that a lot of it is natural. It gets out of control sometimes and was never previously like it is now.

[fatlazyless]

Originally Posted by WinnisquamZ

Agree. Its pollen. We got the same warning over here on Winnisquam]

.... "The bloom material is mixed with dense pollen to varying ... http://www.des.nh.gov/news-and-media...-winnipesaukee ..... degrees. At times, the cyanobacteria material is distinct from the pollen, appearing as green clouds separate from the yellow pollen clouds. In other area the pollen and cyanobacteria are more mixed, appearing just as yellow clouds. See below for varying bloom presentation. Microscopic review indicated the pollen is masking the presence of cyanobacteria."

[TomC]

Effluent from poor/failing septic systems can be another cause...

[Biggd]

We can argue about the causes of bad water, bad air and climate change forever. The only thing that is guaranteed is, doing nothing changes nothing!

[gillygirl]

Originally Posted by WinnisquamZ

But you are allowed to blame man for all of earths problems. Believe you are the only one here with a agenda


Sent from my iPhone using Winnipesaukee Forum mobile app

I’m not the one speaking in absolutes.


Sent from my iPad using Winnipesaukee Forum mobile app

[BroadHopper]

This has been an issue since the McMansion owners started developing the lake. They completely disregard the lake infrastructure as their landscape is the top priority. Look at the fertilizers they use before sunset or sunrise on their lawn!

As for Lake Winnisquam, it all started when they were treating sewage in Laconia next to the public ramp. The discharge created huge bacteria counts on the lake and down the Winnipesaukee River. They finally built the plant next to the Merrimac River in Franklin and diverted sewage there. The lake never recovered.

If only we could foresee this back in the 50s.

[Lake Winnipesaukee Assoc]

6/14/2024 Update: NHDES issued a press release yesterday about the blooms on Winni. They have recommended that "Any surface scum, no matter the color, should be avoided to prevent toxin exposure. Do not recreate, let children play in, or let pets in any surface blooms. NHDES will resample the affected areas on June 19 and will continue weekly resampling if the bloom continues."

https://www.des.nh.gov/news-and-medi...-winnipesaukee

This is what the sample off of Tuftonboro Neck looked like under the microscope. Pollen scums are completely normal for this time of year, but we are seeing more cyanobacteria in these scums as well.

[Onshore]

I've been asked (not told) to refrain from posting on this forum until I retire or move on. I have honored that request but, in this instance, I'm making an exception. This problem is real. This is not just pollen. Fertilizer is not the sole cause. Contributing factors include fertilizers, increased run-off, reduced nutrient uptake in the watershed due to reduced vegetative cover, more geese, higher stream water temperatures due to less tree shading on contributing waters, more nutrients released into streams due to poor soil stabilization practices sites during and after construction, higher water temperatures, lack of winter ice cover, increased mobilization of lakebed sediments and mixing of nutrients in the water column due to boat traffic, increased nutrient contributions from flooding... I could go on. Yes, cyanobacteria are naturally occurring and native to our waters. No, they shouldn't bloom so aggressively. That they do, indicates that the system is currently out of balance giving them a growth advantage until they outstrip the available resources and starve themselves out.

This is our legacy. There is no simple, immediate remedy. People here can, and will, disagree about the causes and the viability of solutions. That said, it would seem that the people here generally do agree that they like their dogs, cats, and kids. Please do not disregard these warnings when they appear. The risk, particularly to pets that may drink from the bloom area, is real. Hopefully, these blooms will pass quickly.

[camp guy]

The post by Onshore is very important reading. People may discuss this situation using different words, but no matter how you slice it, if, by whatever means, the quality of the Lake is degraded to a point where it becomes a health issue, the economy of the Lakes Region, in the summer, will suffer immeasurably.

I read a quote a while back that hits this nail on the head, "Spend more time finding solutions and less time finding blame".

Grandfathered septic systems, poorly enforced regulations, and personal arrogance have all contributed to this problem - now it is the time the correct all this.

[ApS]

Originally Posted by Charlie T

I would expect Saunders Bay, Smith Cove and the areas around Governors Island to have problems soon. Plenty of huge, green lawns in all those areas. What are people thinking? It's the lake, not a Golf course

^
With the exception of three years, I've been in the lake since 1952. No duck itch, no blue-green algae, no Canada Geese, but greater ice density back then.

This is one of Mother Nature's spikes in the sun's heating of the environment--merely somewhat augmented by human presence.

Mother Nature's most memorable heating spike inspired Vikings to plant grapes on the island of Greenland--formerly locked in snow, ice, and glaciers.

"Climate Change" is a natural phenomenon, which is why it no longer makes headlines as "Global Warming".

As to fertilizer, I've seen it spread by hand (broadcast) down to the water's edge near my place. The owners live in Washington, DC, so they're oblivious to their lawn maintenance crew's practices, and may even tip their lawn employees for the greener lawn than their neighbors'.

In 1952, we wouldn't have known the words "McMansion" and "rafting", but "nestled in the woods" would've been common knowledge.

We could return to the 1952 lakefronts of evergreens, pine needles, wildflowers, and moss--but don't hold your breath.

[ITD]

I flew over the lake yesterday and was amazed at the amount of "scum" I could see from 3,500 feet in the broads, complete with boat trails through it. I'm hoping it's just pollen, but who knows.

[Susie Cougar]

Originally Posted by WinnisquamZ

But you are allowed to blame man for all of earths problems. Believe you are the only one here with a agenda


Sent from my iPhone using Winnipesaukee Forum mobile app

What is her agenda that you don’t like?

[John Mercier]

Originally Posted by camp guy

The post by Onshore is very important reading. People may discuss this situation using different words, but no matter how you slice it, if, by whatever means, the quality of the Lake is degraded to a point where it becomes a health issue, the economy of the Lakes Region, in the summer, will suffer immeasurably.

I read a quote a while back that hits this nail on the head, "Spend more time finding solutions and less time finding blame".

Grandfathered septic systems, poorly enforced regulations, and personal arrogance have all contributed to this problem - now it is the time the correct all this.

Once phosphorous enters the system, it is actually pretty hard to remove it... which is why they are using the alum.
The alum binds with it and removes if from the cycle... at least for a time.

[FlyingScot]

Originally Posted by 4 for Boating

So I understand and agree that run off causes issues and there are more than a few homes that for whatever reason were allowed to take waterfront trees down and put in lawns but regarding fertilizer in particular - to say that the homeowners are solely responsible for this aspect (if it is in fact happening and causing these issues) would be overlooking local landscaping firms/businesses that actually do the work and would or should know better.

Good point--they posted on that yesterday, for homeowners and landscapers
https://www.winnipesaukee.com/forums...ad.php?t=29548

[rodgcsa]

I don't post often but I do read the discussions here all of the time. I have learned allot from this group about the lake. So I was on the fence about this subject until last year, Bree posted she needed a volunteer with a boat to bring her team to places on the lake to sample. I was happy to offer my help as I love to learn and observe. I had a friend of mine come along with us as well, that friend who is literally the most intelligent person I have ever met was blown away by the testing and evidence based information he saw. He helped the team sample and since then has read hours upon hours on this subject, he is convinced we are the primary cause of this problem and at the same time we can be the cure. He was a non believer before this! So I just want to say to Bree and her team THANK YOU for the great work you do. Anyone with doubts should contact her and I can guarantee you will have been thankful for what you learn. Its called we all can take small steps to help so please do what you can and most of all educate yourself about this very important matter.

[Biggd]

With the high temps expected this week I don't expect it to get any better anytime soon.

[mishman]

At the risk of sounding redundant (my wife accuses me of this occasionally if you are concerned about the water quality of the lake, I urge you to join the Lake Winnipesaukee Association (winnipesaukee.org). LWA is leading the effort to protect our lake using proven science to both understand the problem and implement solutions. The clear, clean water of our lake is the basis for everything - our recreation, property values and economy of the entire region. If we don't actively work to protect the lake's water quality, we will surely experience its further decline. Please consider supporting LWA today and protect our lake now and for the future. Use this link: https://winnipesaukee.app.neoncrm.co...s/membership-1

[Descant]

Agreed that LWA is important. Don't neglect NHLAKES.org which is statewide. Boats and trailers moving from lake to lake may create issues and when there is pending legislation, getting statewide support for all lakes is important. NHKAKES, among other things, runs the Lake Host program and works closely with NHDES.

[retired]

Stop peeing in the lake. If you have to drain it, strain it.

[gravy boat]

Lol. But the pee doesn’t seem to be the issue. If it is we are all guilty!

We all know it’s shoreline development. I bet many assume their one spot and the fertilized lawns and vegetation won’t matter.

[ApS]

Originally Posted by gravy boat

Lol. But the pee doesn’t seem to be the issue. If it is we are all guilty! We all know it’s shoreline development. I bet many assume their one spot and the fertilized lawns and vegetation won’t matter.

A gardener tells me that urine that is diluted one part to ten parts of water makes a cheap and effective fertilizer.

[John Mercier]

Nitrogen... but we add phosphorous to increase blooms.

[retired]

Most pee that goes into the lake in summer is 50% alcohol anyway.

[fatlazyless]

Monday, June 17: The Meredith Town Docks area now has a cyanobacteria warning .... http://www.des.nh.gov/water/healthy-...wimming-mapper as of today, June 17.

Meredith Bay in that area has two water inflows, Hawkins Brook flows through a large culvert under Rt 25 and into Meredith Bay while the Lake Waukewan channel flows through the Mills Falls mill race into Meredith Bay. Both inlets are north of the town docks. The water depth is about 3' to 6' deep with a sandy bottom.

It could be the presence of Canada goose on Hawkins Brook that is the primary cause of cyanobacteria because that water as seen from the Sam Laverack .... http://www.trailfinder.info/trails/t...-hawkins-brook .... board walk, nature trail has been looking very thick with some contamination on the water surface and there's a number of gooses families consisting of a mother goose, a daddy goose, and 2-3-4-5 yellow feathered new born goose.

Both the Town of Meredith's Clough Park and Hesky Park which border Meredith Bay attract Canada goose with their luxurious beautiful clipped green grass lawns which is a #1 favorite menu item for the goose. The Canada goose just love that easy-to-eat clipped green healthy grass .... is so um-umm-goooood! ..... a big Canada goose yummy favorite.

[granitehead]

I understand that the DES treated Lake Kanasatka fairly successfully with aluminum a couple years ago. Anyone aware of similar plans for Saukee?

[John Mercier]

I think it was last year...
And Winni is too big without a lot of federal dollars being spent.

[fatlazyless]

June 18: Took a walk around the Meredith Town Docks, Hesky Park, and Clough Park, this morning, to get a good look on the cyanobacteria situation. The NH DES has about ten or more 8.5"x11" orange advisory warning signs posted along the large dock boardwalk, town boat launch ramp, Hesky Park and Clough Park shoreline areas.

The grass in both parks close to the water is pretty thick and full of Canada goose poop plus there were maybe 25 Canada goose, adults and yellow goslings present in Clough Park that were eating the green grass.

Could be that mowing the grass will result in grinding up the goose poop into smaller pieces that get into the lake due to rain or wind.

You know that ONE determined ........ person could clean the goose poop all up from both Clough Park and Hesky Park in ONE day or less with a rake, shovel, large dustpan, trash barrel, work gloves and face mask. The two waterfront grassy park areas town parks on both sides of Bay Point at Mills Falls Hotel have about 100-yards, each, of waterfront, or two hundred yards-total, of goose poop polluted green grass. The grass area that's closest to the lake water is the worst.

The goose poop pollution is most thick and dense very close to the Winnipesaukee Lake water probably because the goose are more safe when close to the water so they have a potential easy escape while eating the grass in case a predator like a wily coyote tiptoes in to attack.

[barndoor]

The water was clear when we left Barndoor at 8:30. We returned at 11:15 and the water along the shore is covered with green algae. Have never seen this level of algae on the island during the past 30 years.

[ITD]

Kanasatka was just done a few weeks ago, looks successful so far.

[granitehead]

Be nice if they could spot-treat the reported areas.

[The Real BigGuy]

Do they test the water column at various spots in the larger lake? I understand that they want to focus on the beaches and areas where people congregate but, I wonder what the general health of the lake is?


Sent from my iPhone using Winnipesaukee Forum mobile app

[Lake Fan]

A substantial amount of the lake is now under a Cyano warning. It's early for this, I believe, and the hot weather is only going to make things worse. Been on the lake for 55 years. Shame to see what it's becoming.

[rodgcsa]

With all do respect, if people think the birds have caused this problem then I think the battle is lost. This is people and we need to understand we can just make some small changes to help solve this. I am begging people to read and research this whole situation.

[camp guy]

The RED signs indicating an "advisory" condition for cyanobacteria at certain beaches may prove to be interpreted as 'stay away from this beach', which could easily change the mind of parents thinking about a family day at the beach This could be the lead-in to real economic problems. Families will find other locations to spend their money. This should be a loud and clear wake-up call to the governments around the Lake, and the regulatory officials in Concord. The Lake is the engine that drives the economy in central NH, just like the mountains are what drive the economy in the north country.

[Susie Cougar]

Originally Posted by rodgcsa

With all do respect, if people think the birds have caused this problem then I think the battle is lost. This is people and we need to understand we can just make some small changes to help solve this. I am begging people to read and research this whole situation.

It’s just so sickening what we have done to the lake.

I remember when my dad bought our first camp and we were in Hanson Cove in Toltec. This was 1957. We got our water from the lake. I remember as a kid, the pipe was right next to the beach and it didn’t go that far out. My dad told me never to pee in the lake because we are drinking that water.

How many people do not realize that every bad action that we make has a direct negative result on the lake. Whether it be fertilizer, an old septic tank, or people visiting sandbars who stand around in their own urine. It is beyond mind-boggling to me how we treat the lake now.
What is especially disheartening is the number of people who make excuses for what they do. No one can possibly be doing harm.😂

[WinnisquamZ]

Originally Posted by camp guy

The RED signs indicating an "advisory" condition for cyanobacteria at certain beaches may prove to be interpreted as 'stay away from this beach', which could easily change the mind of parents thinking about a family day at the beach This could be the lead-in to real economic problems. Families will find other locations to spend their money. This should be a loud and clear wake-up call to the governments around the Lake, and the regulatory officials in Concord. The Lake is the engine that drives the economy in central NH, just like the mountains are what drive the economy in the north country.

This comment is straight out of the original Jaws Movie. “Can’t close the beaches what of the tourists?”


Sent from my iPhone using Winnipesaukee Forum mobile app

[Lake Winnipesaukee Assoc]

We've fielded many calls today regarding blooms observed all around the lake. NHDES has also received reports of blooms in the Broads, Center Harbor, and Governor's Island.

Bloom conditions are dynamic, potentially changing hourly. Perform your self risk assessments by looking at the water for any unusual growth or discoloration, such as clouds, ribbons or flecks in the water prior to recreating. If you see anything suspicious or are uncertain, stay out of the water, and please keep pets out as well.

Warnings are issued by NHDES when cell counts exceed 70,000 cells/ml. Counts reported today at the Broads were 80,500 dolichospermum off of Rattlesnake Island, 245,000 cells dolichospermum at Sleepers Point.

Counts at the Center Harbor town beach were 847,000 cells dolichospernum, Additional bloom reports were received for Salmon Meadow Cove and between Avery and Cook's Point.

Sample analysis for the Moultonborough town beach reported 394,000 cells/ml dolichospermum, and Hermit Cove at 476,000 cells/ml.

Additional samples were reviewed from Winter Harbor, Jockey Cove, Sewall Road area and Wolfeboro Bay, all in Wolfeboro.

To stay up to date on these warnings, you shoud sign up for NHDES Waterbody Specific Notifications. You can check the status of the warnings and alerts using the Healthy Swimming Mapper. If you suspect a bloom, please use the NHDES Reporting Tool and contact LWA.

As Cyanobacteria blooms become a more frequent topic of conversation with your friends and family please take the opportunity to tell them about LWA’s work on this issue, and remember, "When in doubt, stay out!"

NHDES will be resampling the areas that had warnings implemented on 6/12 as well as additional areas around the lake tomorrow

Bree Rossiter
Conservation Program Manager

[chachee52]

I would never have thought that after such a windy day on Saturday and the deep water of Broads would have this issue, but Ellacoya and LSP now have the blooms. I have noticed that in the last 8-10 yrs the algae on the rocks/sand have increased significantly. We never had snails on the broads there, and now they are everywhere. Not saying that is was is causing these blooms, but the water temp has definitely increased since I was a kid, and the ice is NO WHERE near the coverage. This all helps not killing things in the lake. How, that's not for me to explain or decide, but it is in my mind a true factor. Sad to see the lake get this "ill" from what it used to be. No matter what anyone thinks is the reason, it is just sad.

[tis]

Originally Posted by Lake Winnipesaukee Assoc

We've fielded many calls today regarding blooms observed all around the lake. NHDES has also received reports of blooms in the Broads, Center Harbor, and Governor's Island.

Bloom conditions are dynamic, potentially changing hourly. Perform your self risk assessments by looking at the water for any unusual growth or discoloration, such as clouds, ribbons or flecks in the water prior to recreating. If you see anything suspicious or are uncertain, stay out of the water, and please keep pets out as well.

Warnings are issued by NHDES when cell counts exceed 70,000 cells/ml. Counts reported today at the Broads were 80,500 dolichospermum off of Rattlesnake Island, 245,000 cells dolichospermum at Sleepers Point.

Counts at the Center Harbor town beach were 847,000 cells dolichospernum, Additional bloom reports were received for Salmon Meadow Cove and between Avery and Cook's Point.

Sample analysis for the Moultonborough town beach reported 394,000 cells/ml dolichospermum, and Hermit Cove at 476,000 cells/ml.

Additional samples were reviewed from Winter Harbor, Jockey Cove, Sewall Road area and Wolfeboro Bay, all in Wolfeboro.

To stay up to date on these warnings, you shoud sign up for NHDES Waterbody Specific Notifications. You can check the status of the warnings and alerts using the Healthy Swimming Mapper. If you suspect a bloom, please use the NHDES Reporting Tool and contact LWA.

As Cyanobacteria blooms become a more frequent topic of conversation with your friends and family please take the opportunity to tell them about LWA’s work on this issue, and remember, "When in doubt, stay out!"

NHDES will be resampling the areas that had warnings implemented on 6/12 as well as additional areas around the lake tomorrow

Bree Rossiter
Conservation Program Manager

So you are saying look before you swim, that it's obvious if it's there? We don't have to all stay out of the water entirely? Do you know when they started testing for cyanobacteria?

[ApS]

I see it as "A Perfect Storm".

1) Last season's heavy rains have washed countless (and distant) green lawns' fertilizers into the greater Winnipesaukee Basin.

2) Recent Lake Kanasatka's obvious blooms "seeded" the Big Lake last season.
(Apply "Occam's Razor" to their problem nearby).

3) No recent breezes to dilute blooms, so hot surface waters are quietly "cooking the broth".

4) The lake's level has been kept artificially high, causing waves (but especially wakes) to reach deeper into the sub-soils which have sequestered tons of phosphorus and nitrogen.

5) Pine-tree pollen, which slows the normal mixing and dilution of Spring's lakefront waters is occurring presently--as normal.

6) A hot seasonal weather pattern which encourages biological growth is upon us and likely to put a synergistic action into this mess.

7) This is not to mention the sandbar problem.

[ishoot308]

Originally Posted by ApS

I see it as "A Perfect Storm".

1) Last season's heavy rains have washed countless (and distant) green lawns' fertilizers into the greater Winnipesaukee Basin.

2) Recent Lake Kanasatka's obvious blooms "seeded" the Big Lake last season.
(Apply "Occam's Razor" to their problem nearby).

3) No recent breezes to dilute blooms, so hot surface waters are quietly "cooking the broth".

4) The lake's level has been kept artificially high, causing waves (but especially wakes) to reach deeper into the sub-soils which have sequestered tons of phosphorus and nitrogen.

5) Pine-tree pollen, which slows the normal mixing and dilution of Spring's lakefront waters is occurring presently--as normal.

6) A hot seasonal weather pattern which encourages biological growth is upon us and likely to put a synergistic action into this mess.

7) This is not to mention the sandbar problem.

Great post APS! I agree with this 100% except for #7. I don't think people swimming (or peeing!) at sandbars has anything to do with algae blooms. #1 through #6 are spot on in my humble opinion however...

I see a lot of people on facebook are mis-identifying cyanobacteria as pollen. Pollen is all over the top of the lake (all lakes) right now and is nothing to worry about as it happens every year at this time...

Dan