Port Aransas, TX tap water
Supplied by Nueces County Wcid 4. Here's what its 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)
Supplier's figure1–6.6 ppm (Low)
Typical 3.9 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: San Patricio MWD and City of Corpus Christi, which supplies Nueces County Wcid 4 (2012–2025).
Water chemistry
General hardness
Supplier's figure236 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From the utility that supplies yours: City of Corpus Christi, which supplies Nueces County Wcid 4 (2025).
Carbonate hardness (alkalinity)
Supplier's figure126–151 ppm
Typical 139 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: San Patricio MWD and City of Corpus Christi, which supplies Nueces County Wcid 4 (2012–2025).
pH
Supplier's figure8–8.2
Typical 8.2
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From the utility that supplies yours: San Patricio MWD and City of Corpus Christi, which supplies Nueces County Wcid 4 (2018).
Total dissolved solids
Supplier's figure643 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
From the utility that supplies yours: City of Corpus Christi, which supplies Nueces County Wcid 4 (2025).
- Nueces County Wcid 4 adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Port Aransas, TX
Nueces County Wcid 4
Serves 88% of residents · Buys water from San Patricio MWD · 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.