B77/100
NASHUA WATER SUPPLY — Water Quality Report 2026
Serving 1,551 people · Iowa
Water Source
Groundwater
County
—
System ID
IA1967041
Violations
20
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: July 23, 2022 – September 12, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: July 23, 2022 – August 26, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2022 – March 31, 2022Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2022 – March 31, 2022Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
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 NASHUA WATER SUPPLY
Is NASHUA WATER SUPPLY water safe to drink?
NASHUA WATER SUPPLY water receives a grade of B (77/100), which is considered good. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has NASHUA WATER SUPPLY detected?
1 contaminants were tested in NASHUA WATER SUPPLY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does NASHUA WATER SUPPLY have any EPA violations?
Yes, NASHUA WATER SUPPLY has 20 EPA violation(s) on record, with the most recent in 2022. Violation types include Other, MR, MON.
How many people does NASHUA WATER SUPPLY serve?
NASHUA WATER SUPPLY serves approximately 1,551 people, Iowa. The system provides water to 1 community: Nashua.
What type of water does NASHUA WATER SUPPLY provide?
NASHUA WATER SUPPLY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA1967041.
How does NASHUA WATER SUPPLY compare to other utilities in Iowa?
NASHUA WATER SUPPLY scores 77/100 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.