Hard water in Jenks, OK

Tap water hardness
148mg/L
8.7gpg
HardCounty estimate

County estimate from 232 water samples in Tulsa County · July 2026

OK typical
152 mg/L
Softener for 3 people
24k grain
Data
County estimate

Water samples from around Jenks put hardness at about 148 mg/L (8.7 gpg), which would be hard on the USGS scale. Treat this as a rough guide: it is the median of 232 samples taken across Tulsa County, mostly wells and streams, not a test of Jenks's treated tap water.

Jenks on the hardness scale, with nearby cities
060120180240300360+OK typical 152Bixby: 92 mg/LBixby 92Broken Arrow: 92 mg/LBroken Arrow 92Catoosa: 92 mg/LCatoosa 92Coweta: 92 mg/LCoweta 92Tulsa: 110 mg/LTulsa 110Sapulpa: 111 mg/LSapulpa 111Sand Springs: 111 mg/LSand Springs 111Owasso: 153 mg/LOwasso 153Skiatook: 153 mg/LSkiatook 153Collinsville: 153 mg/LCollinsville 153Jenks 148mg/L as calcium carbonate060120180240300360+OK 152Bixby: 92 mg/LBixby 92Broken Arrow: 92 mg/LBroken Arr. 92Catoosa: 92 mg/LCatoosa 92Tulsa: 110 mg/LTulsa 110Sapulpa: 111 mg/LSapulpa 111Sand Springs: 111 mg/LSand Sprin. 111148 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Jenks sits close to the typical Oklahoma figure of 152 mg/L. Of the 10 nearest cities we track, 7 have softer water and 3 have harder. The range nearby runs from 92 mg/L in Bixby to 153 in Owasso.

What 148 mg/L means at home

Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.

Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.

Soap and detergent need a little more to lather, and soap scum shows up in the tub.

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 148 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 Jenks

3 people × 75 gallons a day × 8.7 gpg = 1,946 grains a day. A 24,000-grain unit regenerates about every 12 days.

Size it for your household

EPA record for Jenks's water system

We could not match Jenks to a community water system in EPA's records. Your water bill or the yearly Consumer Confidence Report names the system and its ID.

Questions

Is Jenks water hard?

Yes. It measures about 148 mg/L (8.7 grains per gallon), which the USGS classes as hard.

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

About 8.7 gpg. One grain per gallon equals 17.1 mg/L, so 148 mg/L divided by 17.1 gives 8.7.

What size water softener do I need in Jenks?

For 3 people using 75 gallons each per day, 8.7 gpg works out to about 1,946 grains a day. A 24,000-grain softener covers that with a regeneration about every 12 days.

Nearby cities

All 34 cities in Oklahoma

Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.