Crystal City, MO tap water
Supplied mostly by Crystal City PWS, plus 2 other utilities. Here's what the water means for your fish.
Disinfectant
Chlorine or chloramine
Utilities here use chlorine or chloramine, depending on which one serves your address. Chlorine slowly gases off from standing water; chloramine doesn't.
Safety for fish and shrimp
Nitrate (NO₃)
Area estimate0.1–20 ppm (Low)
Typical 1.6 ppm
Low, so water changes lower your tank's nitrate well.
Area estimate from nearby wells: USGS well samples in your state (2000–2023).
Water chemistry
General hardness
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
Carbonate hardness (alkalinity)
Supplier's figure203 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Jefferson County Water Authority, which supplies Herculaneum PWS; Jefferson County Water Authority, which supplies Festus PWS (2016).
pH
7.3–8.8
Typical 7.6
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data; Jefferson County Water Authority, which supplies Herculaneum PWS; Jefferson County Water Authority, which supplies Festus PWS (2012–2019).
- Crystal City PWS, Herculaneum PWS and Festus PWS soften their water at the plant, so it may be softer than the local groundwater.
Who supplies Crystal City, MO
Crystal City PWS
Serves 76% of residents · Groundwater (wells) · Chlorine
Herculaneum PWS
Serves 11% of residents · Buys water from Jefferson County Water Authority · Chloramine
Festus PWS
Serves 9% of residents · Buys water from Jefferson County Water Authority · Chloramine
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.