How hard is the water in Moore, OK?

Tap water hardness
94mg/L
5.5gpg
Moderately hard

Reported by Norman · July 2024

OK typical
152 mg/L
EPA health violations since 2016
7
Softener for 3 people
24k grain
Data
Utility report

Tap water in Moore has about 94 mg/L of hardness, which is 5.5 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Norman, dated July 2024.

Moore on the hardness scale, with nearby cities
060120180240300360+OK typical 152Piedmont: 123 mg/LPiedmont 123The Village: 134 mg/LThe Village 134Edmond: 135 mg/LEdmond 135Shawnee: 140 mg/LShawnee 140Norman: 148 mg/LNorman 148Newcastle: 157 mg/LNewcastle 157Oklahoma City: 157 mg/LOklahoma City 157Yukon: 157 mg/LYukon 157Bethany: 221 mg/LBethany 221Mustang: 463 mg/LMustang 463Moore 94mg/L as calcium carbonate060120180240300360+OK 152The Village: 134 mg/LThe Village 134Norman: 148 mg/LNorman 148Newcastle: 157 mg/LNewcastle 157Oklahoma City: 157 mg/LOklahoma C. 157Bethany: 221 mg/LBethany 221Mustang: 463 mg/LMustang 46394 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 94 mg/L, Moore is 58 mg/L below the typical Oklahoma figure of 152. None of the 10 nearest cities we track has softer water. The range nearby runs from 123 mg/L in Piedmont to 463 in Mustang.

What 94 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Moore

3 people × 75 gallons a day × 5.5 gpg = 1,231 grains a day. A 24,000-grain unit regenerates about every 19 days.

Size it for your household

EPA record for Moore's water system

Moore Public Works Authority · PWSID OK2001412

7 health-based violations since 2016

Serves about 55,083 people from surface water.

Health-based
7
Monitoring or reporting
56
Open now
0

EPA lists Moore Public Works Authority as the system serving Moore. The hardness figure above comes from a different system's report, which TapWaterData uses for Moore.

20162017201820192020202120222023202420252026ArsenicLead and Copper Rule'16'18'20'22'24'26ArsenicLead and Copper Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Arsenicnaturally occurring metal62018–2024Resolved
Lead and Copper Rulecorrosion control and lead sampling12024Resolved

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is Moore water hard?

Somewhat. It measures about 94 mg/L (5.5 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Moore in grains per gallon?

About 5.5 gpg. One grain per gallon equals 17.1 mg/L, so 94 mg/L divided by 17.1 gives 5.5.

What size water softener do I need in Moore?

For 3 people using 75 gallons each per day, 5.5 gpg works out to about 1,231 grains a day. A 24,000-grain softener covers that with a regeneration about every 19 days.

Has the Moore water system had EPA violations?

EPA records show 7 health-based violations for Moore Public Works Authority since 2016, involving Arsenic, Lead and Copper Rule. There were also 56 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 34 cities in Oklahoma

Hardness data: TapWaterData US Water Hardness (utility report, July 1, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.