Public water system · OK1020609
ActiveMcalester Pwa
At a glance
Mcalester Pwa (PWSID OK1020609) is an active community water system in Pittsburg County, Oklahoma. It reports serving 18,206 people through 7,545 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
18,206
Service connections
7,545
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Mcalester Pwa compare with other water systems in Pittsburg County?
By EPA's size categories, Mcalester Pwa is a large system (10,001 to 100,000 people). Pittsburg County has 22 active public water systems, and Mcalester Pwa is the largest of them by population served. Its population served is about 7.9 times the county average of 2,310 people per system, and accounts for 36% of the 50,811 people reported by systems filed under the county. Across Oklahoma, the 1,254 active systems average 2,907 people each. Nationally, the average active community water system reports serving 6,703 people, so Mcalester Pwa is about 172% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Oklahoma has 864 active community water systems, 69% of the state's 1,254 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 175 Oklahoma systems (14%) list surface water as their primary source.
Who owns and regulates Mcalester Pwa?
EPA lists Mcalester Pwa as owned by a local government. The OK state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 20 of the 22 active systems in Pittsburg County (91%) are also owned by a local government.
Does Mcalester Pwa have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in January 2026. The violations listed here began between July 2024 and January 2026. By type: 6 monitoring and reporting, 3 required treatment not met, 2 contaminant level above the legal limit and 1 reporting. The contaminant or rule involved most often is Interim Enhanced Surface Water Treatment Rule (6 of them). EPA lists 7 as resolved and 5 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-01-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Archived |
| 2025-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Archived |
| 2025-10-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Archived |
| 2025-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Archived |
| 2025-03-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2025-02-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Archived |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-07-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2024-07-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Mcalester Pwa: frequently asked questions
Who runs Mcalester Pwa?
Mcalester Pwa (PWSID OK1020609) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Mcalester Pwa serve?
Mcalester Pwa reports serving 18,206 people through 7,545 service connections in Pittsburg County, Oklahoma.
Where does Mcalester Pwa get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Mcalester Pwa have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in January 2026. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Mcalester Pwa's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Mcalester Pwa's water quality report?
As a community water system, Mcalester Pwa must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Pittsburg County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Longtown Rw&Sd #1 (Pittsburg Co.) | Pittsburg | 5,444 | Community | Surface water |
| Adamson Rwd #8 | Pittsburg | 4,221 | Community | Purchased surface water |
| Hartshorne | Pittsburg | 2,300 | Community | Purchased surface water |
| Pittsburg Co. Pwa (Crowder) | Pittsburg | 2,203 | Community | Surface water |
| Krebs Utility Authority | Pittsburg | 2,051 | Community | Surface water |
| Pittsburg Co. Rwd #7 (Arpelar) | Pittsburg | 2,040 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Mcalester Pwa, PWSID OK1020609, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/mcalester-pwa-ok1020609 (data as of October 1, 2026).