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Water Hardness in Carter Lake, IA

Iowa · 1 zip codes · 3 matched water systems

200 PPM
11.7 GPG
Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 240 PPM

Dataset updated March 9, 20263 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Council Bluffs Water Works
IA7820080
Water source: surface water
Serves: 64,447
USGS environmental estimate: 867 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 3 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
1 verified treated-water source
3 matched systems total for this city; treated-water reports are prioritized when available.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Carter Lake

These systems are matched to Carter Lake, IA. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

3 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Council Bluffs Water Works
IA7820080
Hard
200 PPMsurface water64,447 servedVerified — Annual Water Quality Report
Source water: 867 PPM
Carter Lake Water District
IA7812079
Very Hard
867 PPMsurface water3,791 servedHigh Confidence — USGS Monitoring
Lakeside Estates Llc
IA7812601
Very Hard
460 PPMsurface water823 servedHigh Confidence — USGS Monitoring

Zip Codes in Carter Lake, IA

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

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If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Carter Lake, IA.

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Frequently Asked Questions

How hard is the water in Carter Lake, IA?

The citywide weighted average water hardness in Carter Lake, IA is 240 PPM (14 GPG), classified as hard. This is based on 3 matched water systems. The gauge highlights Council Bluffs Water Works, a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in Carter Lake, IA?

With a citywide average hardness of 240 PPM, a water softener is recommended for homes in Carter Lake. Confirm your tap reading before sizing equipment.

Is hard water in Carter Lake, IA safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Carter Lake, IA?

Carter Lake, Iowa is served by 3 matched water systems across 1 zip code.

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