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Dill City, OK Tap Water Quality 2026

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

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

Main Utility: Dill City PWSID: OK2007507 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 8.10 ppb, 54% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Dill City earns a B for water quality

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

Lead: 8.10 ppb — 54% of the federal action level
PFAS never sampled at this system
33 violations since 2015, 20 health-based
No violations currently open
Dill City's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 8.10 ppb — 54% of the federal action level
✓ Lower lead than 4% of Oklahoma utilities
Population Served
136
~219 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
33 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
54% of EPA action level
8.10 ppb
Action level: 15 ppb
The 90th-percentile lead result is 8.10 ppb, 54% 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
Lead and Copper Rule MONITORING AND REPORTING — TT 2026 Unaddressed
Nitrate-Nitrite MCL EXCEEDANCE 17 MG/L — 2026 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 15 MG/L — 2025 Archived
Nitrate-Nitrite MCL EXCEEDANCE 18 MG/L — 2025 Archived
Nitrate-Nitrite MONITORING AND REPORTING — — 2025 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 11 MG/L — 2025 Archived
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 11 MG/L — 2024 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 12 MG/L — 2024 Archived
Nitrate-Nitrite MCL EXCEEDANCE 11 MG/L — 2024 Archived
TTHM MONITORING AND REPORTING — 0.080 mg/L 2024 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2024 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 14 MG/L — 2020 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 15 MG/L — 2020 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2020–2025 Archived
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2020–2025 Archived
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2020–2025 Archived
Gross Beta Particle Activity MONITORING AND REPORTING — 4 mrem/yr 2020–2025 Archived
Nitrate-Nitrite MCL EXCEEDANCE 14 MG/L — 2019 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 14 MG/L — 2018 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 14 MG/L — 2017 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 15 MG/L — 2017 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 12 MG/L — 2017 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 11 MG/L — 2017 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 16 MG/L — 2016 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 11 MG/L — 2016 Resolved
Consumer Confidence Rule OTHER — — 2016 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 12 MG/L — 2016 Resolved
Nitrate-Nitrite MCL EXCEEDANCE 13 MG/L — 2015 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

33 violations are on record since 2015, of which 20 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Dill City
PWSID OK2007507
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 136
Service connections 219
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Dill City tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 8.10 ppb, 54% of the action level.
Does Dill City 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 Dill City? ▼
Dill City (PWSID OK2007507), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2026-02-20. No significant deficiencies were recorded.

What Should Dill City Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
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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