I grappled with this same issue when I bought an island cabin some 15 years ago. We did not want to drink untreated lake water both for reasons of the taste of algae and for ithe potential negative health impacts (of sewage, boat effluent, ground run off, parasites, etc), and I did not trust the UV light system which was installed on the house side of our pump which was taking water from the lake because if there is even the smallest debris or turbidity in the water or on the transparent sleeve through which the UV light shines on the water as it passes, it casts a shadow and then any bacteria in the water survives that pass through. After doing research, I decided to use Seagull filters which solve both the health and taste issues. They are relatively expensive, but if you install 20 micron and then 5 micron sediment filters at the pump (and these are very inexpensive filters), then the more expensive Seagull filters will last an entire season because the cheaper filters remove most of the debris, leaving the smaller stuff and more dangerous stuff for the Seagull filter to remove. Of course, I only use the Seagull filters on the cold water tap at sinks that provide drinking water (brushing teeth, drinking, coffee, tea, cooking) and all the other water that we use -- showers, baths, dish washing, clothes washing -- is not treated this way, but only gets the benefit of the sediment filters. There is a lot of test data on the effectiveness of the Seagull filters for things like benzene, bacteria, viruses, gasoline, parasites, etc. and I also had our water tested by a private lab to confirm its safety. So ever since then, we use these filters at our lake cabin and we are very pleased with the results. Here is a website for the Seagull filters.
http://generalecology.com/ and
http://generalecology.com/category/i...er_with_faucet . Good luck.