San Antonio, FL tap water
Supplied mostly by San Antonio Water Dept-City of, plus 1 other utility. 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
Nitrite (NO₂)
Up to 0.15 ppm (Low)
Typically not detected
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data; Pasco County Utilities - Pasco County Regional Water System's 2024 water quality report (2012–2024).
Nitrate (NO₃)
Up to 11 ppm (Low)
Typical 5.6 ppm
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data; Pasco County Utilities - Pasco County Regional Water System's 2024 water quality report (2012–2024).
Copper at home taps (first draw)
0.97 ppm (High)
The 90th percentile of first-draw samples from homes: water that sat in household pipes for at least six hours.
Shrimp and snails are sensitive to copper. Water that sits in household pipes picks up the most; it drops once the tap has run for a minute.
Published by your utility: Pasco County Utilities - Pasco County Regional Water System's 2024 water quality report.
Water chemistry
General hardness
Area estimate16–306 ppm
Typical 157 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
Area estimate from nearby wells: USGS well samples in your county (2000–2015).
Carbonate hardness (alkalinity)
Supplier's figure98–187 ppm
Typical 142 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Tampa Bay Water -Cypress Creek and Tampa Bay Water Reg. Surface Water Plant, which supplies Pasco County Utilities - Pasco County Regional Water System (2019).
pH
7.1–8
Typical 7.5
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2012–2017).
Total dissolved solids
Area estimate31–309 ppm
Typical 142 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 (2000–2015).
Who supplies San Antonio, FL
San Antonio Water Dept-City of
Serves 81% of residents · Groundwater (wells) · Chlorine
- 2024 water quality report
Pasco County Utilities - Pasco County Regional Water System
Serves 8% of residents · Buys water from Tampa Bay Water -Cypress Creek · 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.