Berthoud, CO water hardness

Tap water hardness
36mg/L
2.1gpg
Soft

Reported by Little Thompson WD · October 2025

CO typical
97 mg/L
EPA health violations since 2016
0
Data
Utility report

The water in Berthoud carries roughly 36 mg/L of dissolved calcium and magnesium, or 2.1 grains per gallon. That is soft water. The number comes from Little Thompson WD, dated October 2025.

Berthoud on the hardness scale, with nearby cities
060120180240300360+CO typical 97Longmont: 20 mg/LLongmont 20Loveland: 28 mg/LLoveland 28Windsor: 31 mg/LWindsor 31Erie: 33 mg/LErie 33Mead: 36 mg/LMead 36Greeley: 37 mg/LGreeley 37Timnath: 41 mg/LTimnath 41Johnstown: 59 mg/LJohnstown 59Firestone: 415 mg/LFirestone 415Evans: 415 mg/LEvans 415Berthoud 36mg/L as calcium carbonate060120180240300360+CO 97Longmont: 20 mg/LLongmont 20Loveland: 28 mg/LLoveland 28Mead: 36 mg/LMead 36Johnstown: 59 mg/LJohnstown 59Firestone: 415 mg/LFirestone 415Evans: 415 mg/LEvans 41536 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Berthoud sits 61 mg/L below the typical Colorado figure of 97. Of the 10 nearest cities we track, 4 have softer water and 5 have harder. The range nearby runs from 20 mg/L in Longmont to 415 in Firestone.

What 36 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

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

Nothing, as far as hardness goes. At 36 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Berthoud's water system

Little Thompson WD · PWSID CO0135477

No health-based violations since 2016

Serves about 25,654 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

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 Berthoud water hard?

No. It measures about 36 mg/L (2.1 grains per gallon), which the USGS classes as soft.

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

About 2.1 gpg. One grain per gallon equals 17.1 mg/L, so 36 mg/L divided by 17.1 gives 2.1.

Has the Berthoud water system had EPA violations?

EPA records show no health-based violations for Little Thompson WD since 2016.

Nearby cities

All 64 cities in Colorado

Hardness data: TapWaterData US Water Hardness (utility report, October 14, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.