Horn Lake, MS tap water
Supplied mostly by City of Horn Lake, plus 3 other utilities. 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)
Area estimate0.4–7 ppm (Low)
Typical 1.5 ppm
Low, so water changes lower your tank's nitrate well.
Area estimate from nearby wells: USGS well samples in your county (2007–2019).
Water chemistry
General hardness
Area estimate10–43 ppm
Typical 31 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 (2007–2019).
Carbonate hardness (alkalinity)
Area estimate14–60 ppm
Typical 35 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
Area estimate from nearby wells: USGS well samples in your county (2005–2019).
pH
Area estimate5.5–6.2
Typical 6
Acidic. Stable water matters more than the exact number.
Area estimate from nearby wells: USGS well samples in your county (2005–2019).
Total dissolved solids
Area estimate27–95 ppm
Typical 75 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 (2007–2019).
- City of Horn Lake adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Horn Lake, MS
City of Horn Lake
Serves 44% of residents · Groundwater (wells) · Chlorine
Horn Lake Water Association
Serves 17% of residents · Groundwater (wells) · Chlorine
Walls Water Assn- Lake Forest
Serves 14% of residents · Groundwater (wells) · Chlorine
City of Horn Lake - Twin Lakes
Serves 11% 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.
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.