A95/100
Winfield Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,035 residents · Iowa
What's In Winfield's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
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
WINFIELD MUNI WATER DEPT
Population Served
1,035
Water Source
Groundwater
System ID
IA4493028
Frequently Asked Questions About Winfield Water
Is Winfield tap water safe to drink?
Winfield, Iowa tap water receives a grade of A (95/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Winfield's water?
1 contaminants were tested in Winfield's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Winfield have any water quality violations?
Yes, Winfield has 5 EPA violation(s) on record, with the most recent in 2013. Violation types include MR, Other. None of these are classified as health-based violations.
Do I need a water filter in Winfield?
Winfield 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. All contaminants are within health goals.
Where does Winfield's tap water come from?
Winfield's drinking water is sourced from groundwater and supplied by WINFIELD MUNI WATER DEPT. The system serves approximately 1,035 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Winfield'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. Winfield'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 Winfield's water compare to other cities in Iowa?
Winfield's water quality score of 95/100 earns a grade of A, which is considered excellent. This places Winfield 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 Winfield's water quality?
If you have concerns about Winfield'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 (WINFIELD MUNI WATER DEPT) 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.