A81/100
North Liberty Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 20,491 residents · Iowa
What's In North Liberty's Tap Water?
52
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.90 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2005.
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
NORTH LIBERTY WATER SUPPLY
Population Served
20,491
Water Source
Groundwater
System ID
IA5252072
Frequently Asked Questions About North Liberty Water
Is North Liberty tap water safe to drink?
North Liberty, Iowa tap water receives a grade of A (81/100), which is considered excellent. Out of 52 contaminants tested, 1 exceed EPA maximum contaminant levels (MCLs) and 1 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 North Liberty's water?
Of the 52 contaminants tested in North Liberty's water supply, the most notable include Copper (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does North Liberty have any water quality violations?
Yes, North Liberty has 7 EPA violation(s) on record, with the most recent in 2005. Violation types include MR, MCL. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in North Liberty?
Based on EPA data, using a water filter in North Liberty is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does North Liberty's tap water come from?
North Liberty's drinking water is sourced from groundwater and supplied by NORTH LIBERTY WATER SUPPLY. The system serves approximately 20,491 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is North Liberty'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. North Liberty'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 North Liberty's water compare to other cities in Iowa?
North Liberty's water quality score of 81/100 earns a grade of A, which is considered excellent. This places North Liberty among the better-performing water systems in Iowa. Visit our Iowa state page to see how all cities in the state compare.
What should I do if I'm concerned about North Liberty's water quality?
If you have concerns about North Liberty'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 (NORTH LIBERTY WATER SUPPLY) 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.