Green Valley, MD tap water
About 32% of Green Valley 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)
24–31 ppm (High)
Typical 30 ppm
High for tap water. Water changes can't take your tank's nitrate below this level.
From EPA monitoring data (2012–2015).
Water chemistry
General hardness
Area estimate35–223 ppm
Typical 67 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 (2001–2019).
Carbonate hardness (alkalinity)
Area estimate19–163 ppm
Typical 49 ppm
Moderate buffering. pH should stay fairly steady.
Area estimate from nearby wells: USGS well samples in your county (2001–2020).
pH
7–7.3
Typical 7.3
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2014).
Total dissolved solids
Area estimate64–292 ppm
Typical 116 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 (2001–2019).
Who supplies Green Valley, MD
Sam Hill Estates
Serves 15% of residents · Groundwater (wells) · Chlorine
Knolls of Windsor
Serves 12% of residents · Groundwater fed by surface water · Chlorine
Bradford Estates
Serves 6% 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.