B74/100
SHEFFIELD WATER SUPPLY — Water Quality Report 2026
Serving 1,130 people · Iowa
Water Source
Groundwater
County
—
System ID
IA3570037
Violations
7
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.42 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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
Frequently Asked Questions About SHEFFIELD WATER SUPPLY
Is SHEFFIELD WATER SUPPLY water safe to drink?
SHEFFIELD WATER SUPPLY water receives a grade of B (74/100), which is considered good. Out of 2 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SHEFFIELD WATER SUPPLY detected?
2 contaminants were tested in SHEFFIELD WATER SUPPLY's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does SHEFFIELD WATER SUPPLY have any EPA violations?
Yes, SHEFFIELD WATER SUPPLY has 7 EPA violation(s) on record, with the most recent in 2014. Violation types include MR, Other, MCL. 2 are health-based violations.
How many people does SHEFFIELD WATER SUPPLY serve?
SHEFFIELD WATER SUPPLY serves approximately 1,130 people, Iowa. The system provides water to 1 community: Sheffield.
What type of water does SHEFFIELD WATER SUPPLY provide?
SHEFFIELD WATER SUPPLY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA3570037.
How does SHEFFIELD WATER SUPPLY compare to other utilities in Iowa?
SHEFFIELD WATER SUPPLY scores 74/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Iowa state page for a full comparison of water systems.