Collinsville, OK Tap Water Quality 2026

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

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

Main Utility: Collinsville PWSID: OK1021505 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead was not detected and no violations are open. No PFAS was detected.

Collinsville earns a C for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: not detected

PFAS tested, none detected

45 violations since 2015, 11 health-based

No violations currently open

Collinsville's lead level vs. all Oklahoma community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: Not detected — 0% of the federal action level

✓ Lower lead than % of Oklahoma utilities

Population Served

6843

~2387 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

45 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

0% of EPA action level

Not detected

Action level: 15 ppb

Copper (Cu)

90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.

161.5% of EPA action level

2,100 ppb

Action level: 1,300 ppb

Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
Nitrate-Nitrite	MONITORING AND REPORTING	—	—	2025	Archived
LEAD AND COPPER RULE REVISIONS	TREATMENT TECHNIQUE	—	—	2024	Resolved
LEAD AND COPPER RULE REVISIONS	REPORTING FAILURE	—	—	2024	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
1,2,4-Trichlorobenzene	MONITORING AND REPORTING	—	0.07 mg/L	2023–2025	Archived
cis-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.07 mg/L	2023–2025	Archived
Xylenes, Total	MONITORING AND REPORTING	—	10 mg/L	2023–2025	Archived
DICHLOROMETHANE	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
o-Dichlorobenzene	MONITORING AND REPORTING	—	0.6 mg/L	2023–2025	Archived
p-Dichlorobenzene	MONITORING AND REPORTING	—	0.075 mg/L	2023–2025	Archived
Vinyl chloride	MONITORING AND REPORTING	—	0.002 mg/L	2023–2025	Archived
1,1-Dichloroethylene	MONITORING AND REPORTING	—	0.007 mg/L	2023–2025	Archived
trans-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.1 mg/L	2023–2025	Archived
1,2-Dichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
1,1,1-Trichloroethane	MONITORING AND REPORTING	—	0.2 mg/L	2023–2025	Archived
Carbon tetrachloride	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
1,2-Dichloropropane	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
Trichloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
1,1,2-Trichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
Tetrachloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
CHLOROBENZENE	MONITORING AND REPORTING	—	0.1 mg/L	2023–2025	Archived
Benzene	MONITORING AND REPORTING	—	0.005 mg/L	2023–2025	Archived
Toluene	MONITORING AND REPORTING	—	1 mg/L	2023–2025	Archived
Ethylbenzene	MONITORING AND REPORTING	—	0.7 mg/L	2023–2025	Archived
Styrene	MONITORING AND REPORTING	—	0.1 mg/L	2023–2025	Archived
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.061 MG/L	0.060 mg/L	2019	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.066 MG/L	0.060 mg/L	2018	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2017–2018	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2017–2018	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2017	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.065 MG/L	0.060 mg/L	2017	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.067 MG/L	0.060 mg/L	2017	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2016	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.067 MG/L	0.060 mg/L	2016	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2016	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.069 MG/L	0.060 mg/L	2016	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.066 MG/L	0.060 mg/L	2016	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2016	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2016	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.061 MG/L	0.060 mg/L	2016	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.061 MG/L	0.060 mg/L	2015	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2015	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.065 MG/L	0.060 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

45 violations are on record since 2015, of which 11 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Collinsville

PWSID OK1021505

Water source Surface water — Drawn from surface water — SDWIS source code SW

Population served 6,843

Service connections 2,387

Systems serving this area 2

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Collinsville tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open.

Does Collinsville water have PFAS? ▼

It was tested for the six regulated PFAS compounds and none were detected.

Who supplies water to Collinsville? ▼

Collinsville (PWSID OK1021505), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2024-12-16. No significant deficiencies were recorded.

What Should Collinsville Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

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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