Hard water in Odessa, TX

Tap water hardness
381mg/L
22.3gpg
Very hard

Reported by City of Odessa · July 2025

TX typical
112 mg/L
EPA health violations since 2016
2
Softener for 3 people
48k grain
Data
Utility report

Tap water in Odessa has about 381 mg/L of hardness, which is 22.3 grains per gallon. On the USGS scale that counts as very hard. The number comes from City of Odessa, dated July 2025.

Odessa on the hardness scale, with nearby cities
060120180240300360+TX typical 112Brownfield: 58 mg/LBrownfield 58Monahans: 88 mg/LMonahans 88Snyder: 101 mg/LSnyder 101Andrews: 114 mg/LAndrews 114Lamesa: 185 mg/LLamesa 185Fort Stockton: 188 mg/LFort Stockton 188Seminole: 222 mg/LSeminole 222West Odessa: 329 mg/LWest Odessa 329San Angelo: 346 mg/LSan Angelo 346Midland: 380 mg/LMidland 380Odessa 381off the scalemg/L as calcium carbonate060120180240300360+TX 112Monahans: 88 mg/LMonahans 88Andrews: 114 mg/LAndrews 114Lamesa: 185 mg/LLamesa 185Seminole: 222 mg/LSeminole 222West Odessa: 329 mg/LWest Odessa 329Midland: 380 mg/LMidland 380381 mg/Loff the scalemg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Odessa sits 269 mg/L above the typical Texas figure of 112. None of the 10 nearest cities we track has harder water. The range nearby runs from 58 mg/L in Brownfield to 380 in Midland.

What 381 mg/L means at home

Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.

Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.

Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.

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

At 381 mg/L most of the trouble is scale, and only a few things deal with it.

Ion-exchange water softener

The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.

Salt-free conditioner

No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.

Reverse osmosis or carbon filter

Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.

Softener size for Odessa

3 people × 75 gallons a day × 22.3 gpg = 5,011 grains a day. A 48,000-grain unit regenerates about every 9 days.

Size it for your household

EPA record for Odessa's water system

City of Odessa · PWSID TX0680002

2 health-based violations since 2016

Serves about 123,334 people from surface water.

Health-based
2
Monitoring or reporting
11
Open now
1
20162017201820192020202120222023202420252026Surface Water Treatment Rule'16'18'20'22'24'26Surface Water Treatment Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Surface Water Treatment Rulefiltration and disinfection22019–2021Resolved

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 Odessa water hard?

Yes. It measures about 381 mg/L (22.3 grains per gallon), which the USGS classes as very hard.

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

About 22.3 gpg. One grain per gallon equals 17.1 mg/L, so 381 mg/L divided by 17.1 gives 22.3.

What size water softener do I need in Odessa?

For 3 people using 75 gallons each per day, 22.3 gpg works out to about 5,011 grains a day. A 48,000-grain softener covers that with a regeneration about every 9 days.

Has the Odessa water system had EPA violations?

EPA records show 2 health-based violations for City of Odessa since 2016, involving Surface Water Treatment Rule. There were also 11 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 342 cities in Texas

Hardness data: TapWaterData US Water Hardness (utility report, July 9, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.