Laplace, LA tap water
Supplied mostly by St John Water District 3, plus 1 other utility. Here's what the water means for your fish.
Disinfectant
Chloramine
Your water is treated with chloramine. Unlike chlorine, it doesn't gas off when water sits out, and many pitcher and fridge filters aren't rated to remove it. Conditioners that list chloramine on the label break it apart, which frees a little ammonia. Some utilities switch to plain chlorine for a few weeks a year.
Safety for fish and shrimp
Nitrate (NO₃)
Area estimate0.1–11 ppm (Low)
Typical 0.9 ppm
Low, so water changes lower your tank's nitrate well.
Area estimate from nearby wells: USGS well samples in your state (2000–2021).
Water chemistry
General hardness
Area estimate3–451 ppm
Typical 39 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 state (2000–2021).
Carbonate hardness (alkalinity)
76 ppm
Moderate buffering. pH should stay fairly steady.
From EPA monitoring data (2012–2016).
pH
7.3
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2012–2019).
Total dissolved solids
Area estimate46–750 ppm
Typical 252 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 state (2000–2021).
- St John Water District 3 adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Laplace, LA
St John Water District 3
Serves 49% of residents · Groundwater (wells) · Chloramine
St John Water District 1
Serves 46% of residents · Lake or river water · 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.