Northwest Harbor, NY tap water
About 50% of Northwest Harbor is inside a utility's service area. Homes outside it likely use private wells, which no utility tests.
Disinfectant
Chlorine
Utility water here is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it. Private wells aren't treated by a utility, so there's no chlorine or chloramine unless a treatment system adds it.
Safety for fish and shrimp
Nitrate (NO₃)
5.4–6.4 ppm (Low)
Typical 5.4 ppm
Water changes can't take your tank's nitrate below this level.
Published by the utility: Suffolk County Water Authority's water quality report.
Copper at home taps (first draw)
0.5–1 ppm (High)
The 90th percentile of first-draw samples from homes: water that sat in household pipes for at least six hours.
Shrimp and snails are sensitive to copper. Water that sits in household pipes picks up the most; it drops once the tap has run for a minute.
Published by the utility: Suffolk County Water Authority's water quality report.
Water chemistry
General hardness
186–495 ppm
Typical 259 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
Published by the utility: Suffolk County Water Authority's water quality report.
Carbonate hardness (alkalinity)
30–54 ppm
Typical 40 ppm
Moderate buffering. pH should stay fairly steady.
Published by the utility: Suffolk County Water Authority's water quality report.
pH
6.5–7
Typical 6.8
Most community fish do well here. Stable water matters more than the exact number.
Published by the utility: Suffolk County Water Authority's water quality report.
Total dissolved solids
59–88 ppm
Typical 69 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
Published by the utility: Suffolk County Water Authority's water quality report.
- Suffolk County Water Authority adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Northwest Harbor, NY
- Water quality report
Suffolk County Water Authority
Serves 50% of residents · Groundwater (wells) · Chlorine
Our data comes from public records and is still incomplete. Many utilities don't publish every number, so we're adding more all the time. Your city's range is a starting point: testing your own tap is the only way to know exactly what's in it.
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Compiled by Shoal & Stem from public records. Free to cite with a link.