St. Gabriel, LA tap water
About 45% of St. Gabriel is inside a utility's service area. Homes outside it likely use private wells, which no utility tests.
Disinfectant
Chloramine
Utility water here 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. 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)
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
Supplier's figure0–52 ppm
Typical 26 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
From the utility that supplies it: Baton Rouge Water Company, which supplies East Iberville Water System; Baton Rouge Water Company, which supplies Magnolia - Plantation Gardens (2025).
Carbonate hardness (alkalinity)
Supplier's figure124–212 ppm
Typical 143 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies it: Baton Rouge Water Company, which supplies East Iberville Water System, measured before treatment; Baton Rouge Water Company, which supplies Magnolia - Plantation Gardens, measured before treatment (2012–2019).
pH
Supplier's figure5.2–8.9
Typical 7
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies it: Baton Rouge Water Company, which supplies East Iberville Water System; Baton Rouge Water Company, which supplies Magnolia - Plantation Gardens (2025).
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).
- Intracoastal Water System East, East Iberville Water System and Magnolia - Plantation Gardens add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies St. Gabriel, LA
Intracoastal Water System East
Serves 31% of residents · Groundwater (wells) · Chloramine
East Iberville Water System
Serves 8% of residents · Buys water from Baton Rouge Water Company · Chloramine
Magnolia - Plantation Gardens
Serves 6% of residents · Buys water from East Iberville Water System · 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.