How hard is the water in Cold Spring, KY?

Tap water hardness
110mg/L
6.4gpg
Moderately hard

Reported by Northern Kentucky Water District · September 2025

KY typical
134 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

Cold Spring water measures 110 mg/L (6.4 gpg) of hardness, moderately hard by USGS standards. The number comes from Northern Kentucky Water District, dated September 2025.

Cold Spring on the hardness scale, with nearby cities
060120180240300360+KY typical 134Highland Heights: 110 mg/LHighland Heights 110Taylor Mill: 110 mg/LTaylor Mill 110Alexandria: 110 mg/LAlexandria 110Covington: 110 mg/LCovington 110Fort Thomas: 110 mg/LFort Thomas 110Newport: 110 mg/LNewport 110Fort Wright: 110 mg/LFort Wright 110Bellevue: 110 mg/LBellevue 110Edgewood: 110 mg/LEdgewood 110Fort Mitchell: 110 mg/LFort Mitchell 110Cold Spring 110mg/L as calcium carbonate060120180240300360+KY 134Highland Heights: 110 mg/LHighland H. 110Taylor Mill: 110 mg/LTaylor Mill 110Alexandria: 110 mg/LAlexandria 110Covington: 110 mg/LCovington 110Fort Thomas: 110 mg/LFort Thomas 110Newport: 110 mg/LNewport 110110 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 110 mg/L, Cold Spring is 24 mg/L below the typical Kentucky figure of 134. None of the 10 nearest cities we track has harder water.

What 110 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 Cold Spring

3 people × 75 gallons a day × 6.4 gpg = 1,447 grains a day. A 24,000-grain unit regenerates about every 16 days.

Size it for your household

EPA record for Cold Spring's water system

Northern Kentucky Water District · PWSID KY0590220

No health-based violations since 2016

Serves about 259,949 people from surface water.

Health-based
0
Monitoring or reporting
1
Open now
0

TapWaterData ties Cold Spring to this system. EPA's service-area records do not name Cold Spring, so check the utility printed on your water bill.

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 Cold Spring water hard?

Somewhat. It measures about 110 mg/L (6.4 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Cold Spring in grains per gallon?

About 6.4 gpg. One grain per gallon equals 17.1 mg/L, so 110 mg/L divided by 17.1 gives 6.4.

What size water softener do I need in Cold Spring?

For 3 people using 75 gallons each per day, 6.4 gpg works out to about 1,447 grains a day. A 24,000-grain softener covers that with a regeneration about every 16 days.

Has the Cold Spring water system had EPA violations?

EPA records show no health-based violations for Northern Kentucky Water District since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 37 cities in Kentucky

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