New York camping water: official advisories and what to do
Before swimming or collecting water at a New York lake or river, check the state's official advisory pages. We link to them and never copy or show their status.
Official New York advisory pages
- Harmful algal bloom notifications and NYHABS map (NYS DEC) (Link checked Oct 30, 2026)
- Harmful blue-green algae blooms: health information (NYS Department of Health) (Link checked Oct 30, 2026)
Check the official map before swimming or collecting water. We never call a lake safe.
Campgrounds near lakes and rivers in New York
- Hamlin Beach State ParkLake OntarioOfficial park pageCheck current advisories
- Allegany State Park (Quaker Area)Quaker LakeOfficial park pageCheck current advisories
- Letchworth State ParkGenesee RiverOfficial park pageCheck current advisories
Links checked Oct 30, 2026.
New York tips
- DEC's NYHABS map marks blooms reported in the past two weeks with a black halo. Reports are posted after DEC staff review them.
- DEC notes that a waterbody with no report on NYHABS may still have a bloom, and conditions may have changed since a report.
Water from a lake, river or stream? What to do
- Avoid it first if you see a bloom. Green, blue-green or brown scum, “pea soup” or spilled-paint water means stay out and don't drink, cook with or filter it, and keep pets out. Minnesota Dept. of Health says backcountry treatment devices can't remove algae toxins, and that boiling won't remove them and can even raise toxin levels. Find another source.
- Filter. If the water is cloudy, let it settle and then filter it. Filtering removes many germs but not dissolved chemicals or toxins.
- Boil or disinfect. CDC says boiling is the best way to kill germs: a rolling boil for 1 minute, or 3 minutes above 6,500 feet. The next best option is to filter and then disinfect. Follow the product label. See also EPA's emergency disinfection steps. Boiling and disinfecting don't make water with chemicals or toxins drinkable.
- Test when you can. A home kit or a certified lab can check things like bacteria and nitrate, which is useful for a cabin well or a spring you use often. Algae toxins need their own special tests: North Carolina DEQ says testing for them is specialized, and EPA says field screening kits only give a rough result that should be confirmed with a lab method. A regular water test won't tell you a bloom is harmless, so avoid bloom water.
No advisory doesn't mean no bloom. Oregon's health authority warns: “A waterbody with no recreational health advisory does not mean that a bloom is not present” (OHA). Check the official map before swimming or collecting water. When in doubt, stay out. More on blooms: EPA harmful algal blooms.
Camping water guides
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