B75/100
Coralville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 22,318 residents · Iowa
What's In Coralville's Tap Water?
66
Contaminants Tested
0
Exceed EPA Limits
2
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
strontium | 2020.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
CORALVILLE MUNI WATER SYSTEM
Population Served
22,318
Water Source
Groundwater
System ID
IA5208071
Frequently Asked Questions About Coralville Water
Is Coralville tap water safe to drink?
Coralville, Iowa tap water receives a grade of B (75/100), which is considered good. Out of 66 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 2 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Coralville's water?
Of the 66 contaminants tested in Coralville's water supply, the most notable include Lead (90th percentile), strontium. No contaminants exceed EPA legal limits. 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Coralville have any water quality violations?
Yes, Coralville has 15 EPA violation(s) on record, with the most recent in 2018. Violation types include MON, MCL, MR. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Coralville?
Coralville water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 2 contaminant(s) exceed these stricter goals.
Where does Coralville's tap water come from?
Coralville's drinking water is sourced from groundwater and supplied by CORALVILLE MUNI WATER SYSTEM. The system serves approximately 22,318 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Coralville's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Coralville's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Coralville's water compare to other cities in Iowa?
Coralville's water quality score of 75/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Iowa state page to see how all cities in the state compare.
What should I do if I'm concerned about Coralville's water quality?
If you have concerns about Coralville's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (CORALVILLE MUNI WATER SYSTEM) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.