Public water system · OK2004709
ActiveByars
At a glance
Byars (PWSID OK2004709) is an active community water system in McClain County, Oklahoma. It reports serving 275 people through 160 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
275
Service connections
160
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Byars compare with other water systems in McClain County?
By EPA's size categories, Byars is a very small system (500 people or fewer). McClain County has 14 active public water systems. Its population served is well below the county average of 1,745 people per system, and accounts for 1.1% of the 24,436 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 Byars is well below 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 701 Oklahoma systems (56%) list groundwater as their primary source.
Who owns and regulates Byars?
EPA lists Byars 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. 11 of the 14 active systems in McClain County (79%) are also owned by a local government.
Does Byars have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2014. The violations listed here began between January 2010 and January 2014. By type: 11 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Selenium, Barium, Beryllium and Chromium. EPA lists 12 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Resolved |
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | 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.
Byars: frequently asked questions
Who runs Byars?
Byars (PWSID OK2004709) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Byars serve?
Byars reports serving 275 people through 160 service connections in McClain County, Oklahoma.
Where does Byars get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Byars have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2014. 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 Byars' 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, one is health-based, and the most recent began in January 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Byars' water quality report?
As a community water system, Byars 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 McClain County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Newcastle | McClain | 7,900 | Community | Purchased surface water |
| Purcell | McClain | 6,693 | Community | Groundwater |
| Blanchard | McClain | 2,966 | Community | Purchased surface water |
| Goldsby Water Auth Trust | McClain | 2,000 | Community | Groundwater |
| Mcclain Co Rwd # 8 | McClain | 1,897 | Community | Groundwater |
| Wayne | McClain | 688 | Community | Groundwater |
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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, “Byars, PWSID OK2004709, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/byars-ok2004709 (data as of October 1, 2026).