City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Cedar Rapids, Iowa.
Median indexed hardness
276PPM
6 indexed ZIPs
Range 276–285 PPM
City summary
Cedar Rapids has 6 published ZIP profiles across Linn County. The indexed median is 276 PPM, compared with 281 PPM across Iowa.
Among the 683 Iowacities with an indexed median, Cedar Rapids ranks #343from highest to lowest. Across all 723 state ZIP profiles, available estimates run from 182to 834 PPM.
The 276–285 PPM range shows how much the available ZIP estimates vary within the city label.
Hardness distribution
6 of 6 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Feb 16, 2016 to Jun 3, 2026.
ZIP directory
Open a ZIP for site-level provenance and measurements.
ZIP code
276 PPM
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ZIP code
276 PPM
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ZIP code
276 PPM
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ZIP code
276 PPM
View full ZIP evidence →
ZIP code
285 PPM
View full ZIP evidence →
ZIP code
285 PPM
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Public water systems
PWSID IA5715093
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5715602
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5700600
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5784311
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5784302
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5715301
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5784314
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5715802
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID IA5784312
The system names this served city; Census place overlap links the city to this ZCTA.
Compliance history
No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.
| Record | System | Period | Status |
|---|---|---|---|
| Lead and Copper Rule | IA5784311 | Dec 1, 2025 | Resolved |
| Public Notice | IA5784311 | Mar 6, 2025 | Resolved |
| Lead and Copper Rule | IA5784314 | Dec 1, 2024 | Resolved |
| Public Notice | IA5784311 | Oct 22, 2024 | Resolved |
| Nitrate | IA5784311 | Jul 1, 2024 | Resolved |
| Consumer Confidence Rule | IA5715802 | Jul 1, 2024 | Resolved |
| E. COLI | IA5784311 | Jun 16, 2024 | Resolved |
| TTHM | IA5784302 | Aug 1, 2023 | Resolved |
| Total Haloacetic Acids (HAA5) | IA5784302 | Aug 1, 2023 | Resolved |
| Public Notice | IA5784314 | May 13, 2023 | Resolved |
Practical next steps
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Questions people ask
The indexed city median is 276 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.
Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.
Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.