Water Quality in Cedar Rapids, IA: 1078 Violations — Grade C
Grade C · Score 59/100 · 5 water systems · Updated 2026-05-03
Cedar Rapids's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Cedar Rapids, IA — 1078 compliance events documented in the federal drinking water record.
Water Quality Map: Cedar Rapids, IA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Water Quality by ZIP Code in Cedar Rapids
Water quality varies across Cedar Rapids's 14 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 52404 | D | 50 | 77 | 2 | View report → |
| 52405 | D | 50 | 77 | 2 | View report → |
| 52401 | C | 55 | 77 | 2 | View report → |
| 52403 | C | 55 | 77 | 2 | View report → |
| 52402 | C | 60 | 77 | 2 | View report → |
| 52407 | C | 60 | 77 | 2 | View report → |
| 52409 | C | 60 | 77 | 2 | View report → |
| 52410 | C | 60 | 77 | 2 | View report → |
| 52497 | C | 60 | 77 | 2 | View report → |
| 52498 | C | 60 | 77 | 2 | View report → |
| 52499 | C | 60 | 77 | 2 | View report → |
| 52406 | C | 65 | 77 | 2 | View report → |
| 52408 | C | 65 | 77 | 2 | View report → |
| 52411 | C | 65 | 77 | 2 | View report → |
Water Quality Overview
Cedar Rapids, Iowa receives a water quality grade of C with an overall score of 59 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 5 water systems serving Cedar Rapids have accumulated 1078 EPA violations, including 28 health-based violations. These violations are tracked across 14 ZIP codes serving approximately 143,902 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Cedar Rapids's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Cedar Rapids water systems is 0.0016 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 61% of homes built before 1986, Cedar Rapids has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Radon Risk
Cedar Rapids is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Cedar Rapids
Cedar Rapids is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 143,902 people across 14 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 140 enforcement actions against water systems serving Cedar Rapids. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Cedar Rapids
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Cedar Rapids Water Systems
The following contaminants have been detected or caused violations across Cedar Rapids's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Lead and Copper Rule | Treatment Technique | N/A | 336 | 14 | No |
| Copper | Inorganic | 1.3 mg/L | 168 | 14 | Yes |
| Surface Water Treatment Rule | Treatment Technique | N/A | 112 | 14 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 98 | 14 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 42 | 14 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 28 | 14 | No |
| Lead | Inorganic | 0.015 mg/L | 28 | 14 | No |
| Chlorine residual | Disinfectant | 4 mg/L | 14 | 14 | Yes |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Cedar Rapids. Recent actions:
| Date | Action Type |
|---|---|
| 2023-11-09 | State Order Extension |
| 2023-08-31 | State Order Extension |
| 2023-07-03 | State Order Extension |
| 2023-07-03 | State Informal Action |
| 2023-06-22 | State Filed Judgment |
| 2023-06-22 | State Informal Action |
| 2023-03-30 | State Order Extension |
| 2023-02-03 | State Filed Judgment |
| 2022-11-17 | State Informal Action |
| 2022-11-17 | State Order Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2023-11-09.
Cedar Rapids vs. Nearby Iowa Cities
How Cedar Rapids's water quality compares to similar cities in Iowa:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Cedar Rapids | C | 1078 | 5 | 143,902 |
| Davenport | D | 90 | 5 | 148,758 |
| Iowa City | D | 84 | 5 | 98,352 |
| Ames | C | 10 | 5 | 97,632 |
Water Quality by ZIP Code in Cedar Rapids
Water quality varies across Cedar Rapids's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 52404 | 50 | D | 77 | 2 |
| 52405 | 50 | D | 77 | 2 |
| 52401 | 55 | C | 77 | 2 |
| 52403 | 55 | C | 77 | 2 |
| 52402 | 60 | C | 77 | 2 |
| 52407 | 60 | C | 77 | 2 |
| 52409 | 60 | C | 77 | 2 |
| 52410 | 60 | C | 77 | 2 |
| 52497 | 60 | C | 77 | 2 |
| 52498 | 60 | C | 77 | 2 |
| 52411 | 65 | C | 77 | 2 |
| 52408 | 65 | C | 77 | 2 |
| 52406 | 65 | C | 77 | 2 |
| 52499 | 60 | C | 77 | 2 |
| 52498 | 60 | C | 77 | 2 |
Common Questions About Cedar Rapids Water
These are the most common questions residents search for about water quality in Cedar Rapids, Iowa:
Is Cedar Rapids water hard or soft? Water hardness varies by source. Cedar Rapids's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Cedar Rapids tap water? Cedar Rapids's water receives a grade of C (59/100). There are 28 health-based violations — consider filtration.
What is the best water filter for Cedar Rapids? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Cedar Rapids vs. Iowa Average
Understanding how Cedar Rapids compares to the broader Iowa average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Cedar Rapids.
ZIP Codes in Cedar Rapids
Cedar Rapids spans 14 ZIP codes. The ZIP with the lowest water quality score is 52401. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.