States ›Iowa ›Adams County ›Corning

Corning, IA Tap Water Quality 2026

Water quality report for Corning, IA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Corning's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Corning Muni Water Department PWSID: IA0220075 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.50 ppb, 17% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Corning earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 2.50 ppb — 17% of the federal action level
PFAS never sampled at this system
4 violations since 2015, 2 health-based
No violations currently open
Corning's lead level vs. all Iowa community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.50 ppb — 17% of the federal action level
✓ Lower lead than 38% of Iowa utilities
Population Served
1432
~1001 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
4 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
17% of EPA action level
2.50 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.50 ppb, 17% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Nitrate MONITORING AND REPORTING — 10 mg/L 2024–2025 Resolved
Chlorite MCL EXCEEDANCE 1.12 MG/L 1.0 mg/L 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

4 violations are on record since 2015, of which 2 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Corning Muni Water Department
PWSID IA0220075
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 1,432
Service connections 1,001
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Corning tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.50 ppb, 17% of the action level.
Does Corning water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Corning? ▼
Corning Muni Water Department (PWSID IA0220075). Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2023-09-06. Inspectors recorded 1 significant deficiency.

What Should Corning Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Iowa