Charlestown, RI tap water
Supplied mostly by South Kingstown-South Shore, plus 1 other utility. Here's what the water means for your fish.
Disinfectant
Chlorine
Your water is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it.
Safety for fish and shrimp
Nitrate (NO₃)
1.6–9.7 ppm (Low)
Typical 3.2 ppm
Low, so water changes lower your tank's nitrate well.
From EPA monitoring data, measured before treatment (2012–2017).
Water chemistry
General hardness
Area estimate35–51 ppm
Typical 50 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
Area estimate from nearby wells: USGS well samples in your county (2000–2019).
Carbonate hardness (alkalinity)
36 ppm
Moderate buffering. pH should stay fairly steady.
From EPA monitoring data (2017).
pH
7.9
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2017).
Total dissolved solids
Area estimate88–112 ppm
Typical 107 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
Area estimate from nearby wells: USGS well samples in your county (2000–2019).
- South Kingstown-South Shore adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Charlestown, RI
South Kingstown-South Shore
Serves 31% of residents · Groundwater (wells) · Chlorine
Church Woods
Serves 16% of residents · Groundwater (wells) · Disinfectant not listed
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.
Tap water lookup covers US cities only for now. Want to know why it matters? Read our story on tap water.
Compiled by Shoal & Stem from public records. Free to cite with a link.