Carlton Landing, OK Tap Water Quality 2026

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

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

Main Utility: Longtown Rw&sd #1 (pittsburg Co.) PWSID: OK1020623 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 2.10 ppb, 14% of the action level and no violations are open. PFAS was sampled but not enough times for a compliance determination.

Carlton Landing earns a B for water quality

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

Lead: 2.10 ppb — 14% of the federal action level

PFAS sampled, too few results to judge

32 violations since 2015, 23 health-based

No violations currently open

Carlton Landing's lead level vs. all Oklahoma community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 2.10 ppb — 14% of the federal action level

✓ Lower lead than 47% of Oklahoma utilities

Population Served

~2274 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

32 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

14% of EPA action level

2.10 ppb

Action level: 15 ppb

The 90th-percentile lead result is 2.10 ppb, 14% 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)

Contaminant	Type	Measured	Limit	Period	Status
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.062 MG/L	0.060 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.097 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.085 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.083 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.093 MG/L	0.080 mg/L	2025	Archived
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2025	Resolved
TTHM	MCL EXCEEDANCE	0.091 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.117 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.088 MG/L	0.080 mg/L	2025	Archived
LEAD AND COPPER RULE REVISIONS	TREATMENT TECHNIQUE	—	—	2024	Resolved
LEAD AND COPPER RULE REVISIONS	REPORTING FAILURE	—	—	2024	Resolved
TTHM	MCL EXCEEDANCE	0.1 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.132 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.126 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.092 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.084 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.12 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.102 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.086 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.089 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.091 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.091 MG/L	0.080 mg/L	2021	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2020	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2020	Resolved
BHC-GAMMA	MONITORING AND REPORTING	—	0.0002 mg/L	2020–2022	Archived
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Consumer Confidence Rule	OTHER	—	—	2016	Resolved
Coliform (TCR)	MONITORING AND REPORTING	—	5% of samples	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

32 violations are on record since 2015, of which 23 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Longtown Rw&Sd #1 (Pittsburg Co.)

PWSID OK1020623

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

Population served 6

Service connections 2,274

Systems serving this area 1

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Carlton Landing tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 2.10 ppb, 14% of the action level.

Does Carlton Landing water have PFAS? ▼

It was sampled, but no sampling point had enough results for a compliance determination.

Who supplies water to Carlton Landing? ▼

Longtown Rw&Sd #1 (Pittsburg Co.) (PWSID OK1020623). Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2025-01-28. No significant deficiencies were recorded.

What Should Carlton Landing 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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