Hard water in Bettendorf, IA
Reported by Dodds Valley View Water Assn · August 2025
- IA typical
- 183 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Bettendorf carries roughly 121 mg/L of dissolved calcium and magnesium, or 7.1 grains per gallon. That is hard water. The number comes from Dodds Valley View Water Assn, dated August 2025.
Bettendorf sits 62 mg/L below the typical Iowa figure of 183. Of the 10 nearest cities we track, 3 have softer water and 7 have harder. The range nearby runs from 49 mg/L in North Liberty to 264 in Waterloo.
What 121 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 121 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.
3 people × 75 gallons a day × 7.1 gpg = 1,593 grains a day. A 24,000-grain unit regenerates about every 15 days.
EPA record for Bettendorf's water system
No health-based violations since 2016
Serves about 220 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 15
- 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 Bettendorf water hard?
Yes. It measures about 121 mg/L (7.1 grains per gallon), which the USGS classes as hard.
What is the water hardness in Bettendorf in grains per gallon?
About 7.1 gpg. One grain per gallon equals 17.1 mg/L, so 121 mg/L divided by 17.1 gives 7.1.
What size water softener do I need in Bettendorf?
For 3 people using 75 gallons each per day, 7.1 gpg works out to about 1,593 grains a day. A 24,000-grain softener covers that with a regeneration about every 15 days.
Has the Bettendorf water system had EPA violations?
EPA records show no health-based violations for Dodds Valley View Water Assn since 2016. There were also 15 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Davenport196 mg/LVery hard
- Muscatine240 mg/LVery hard
- Iowa City76 mg/LModerately hard
- North Liberty49 mg/LSoft
- Dubuque195 mg/LVery hard
- Marion128 mg/LHard
- Cedar Rapids128 mg/LHard
- Hiawatha125 mg/LHard
- Oskaloosa110 mg/LModerately hard
- Waterloo264 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, August 28, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.