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Leon, IA Tap Water Quality 2026

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

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

Main Utility: Leon Water Supply PWSID: IA2742076 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.00 ppb, 20% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Leon earns a B for water quality

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

Lead: 3.00 ppb — 20% of the federal action level
PFAS never sampled at this system
10 violations since 2015, 7 health-based
No violations currently open
Leon's lead level vs. all Iowa community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.00 ppb — 20% of the federal action level
✓ Lower lead than 36% of Iowa utilities
Population Served
1763
~825 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
10 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
20% of EPA action level
3.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.00 ppb, 20% 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
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2023 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2022 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2022 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2022 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2022 Resolved
CARBON, TOTAL MONITORING AND REPORTING — TT 2018 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.064 MG/L 0.060 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.061 MG/L 0.060 mg/L 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

10 violations are on record since 2015, of which 7 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Leon Water Supply
PWSID IA2742076
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 1,763
Service connections 825
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Leon tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.00 ppb, 20% of the action level.
Does Leon 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 Leon? ▼
Leon Water Supply (PWSID IA2742076). Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2023-08-02. No significant deficiencies were recorded.

What Should Leon 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.

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