Owasso, OK tap water
Supplied mostly by Washington Co RWD #3 (NEW,#1), 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)
Supplier's figureUp to 1.4 ppm (Low)
Typical 0.7 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Tulsa, which supplies Owasso (2025).
Water chemistry
General hardness
Supplier's figure89–140 ppm
Typical 89 ppm
Moderately soft to medium. Suits most community fish and plants.
From the utility that supplies yours: Tulsa, which supplies Owasso.
Carbonate hardness (alkalinity)
Supplier's figure82–116 ppm
Typical 103 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: Tulsa, which supplies Owasso; EPA monitoring data, measured before treatment (2012–2019).
pH
Supplier's figure7.5–8.5
Typical 8
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies yours: Tulsa, which supplies Owasso (2025).
- Washington Co RWD #3 (NEW,#1) softens its water at the plant, so it may be softer than the local groundwater.
Who supplies Owasso, OK
Washington Co RWD #3 (NEW,#1)
Serves 48% of residents · Lake or river water · Chlorine
Owasso
Serves 32% of residents · Buys water from Tulsa · Chloramine
Rogers Co RWD # 3 Lake Plant
Serves 15% of residents · Lake or river water · Chlorine
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.