Public water system · TX0070023

Active

Mccoy WSC

At a glance

Mccoy WSC (PWSID TX0070023) is an active community water system in Atascosa County, Texas. It reports serving 9,621 people through 3,207 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, 2 are health-based, and the most recent began in February 2021.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

9,621

Service connections

3,207

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDTX0070023

System typeCommunity water system

Activity statusActive

Population served9,621

Service connections3,207

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyTX state drinking water program

City served—

StateTexas

ZIP—

CountyAtascosa County

How does Mccoy WSC compare with other water systems in Atascosa County?

By EPA's size categories, Mccoy WSC is a medium system (3,301 to 10,000 people). Atascosa County has 12 active public water systems, and Mccoy WSC is the 2nd-largest of them by population served. Its population served is about 152% above the county average of 3,811 people per system, and accounts for 21% of the 45,736 people reported by systems filed under the county. Across Texas, the 7,078 active systems average 4,789 people each. Nationally, the average active community water system reports serving 6,703 people, so Mccoy WSC is about 44% 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. Texas has 4,594 active community water systems, 65% of the state's 7,078 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 5,215 Texas systems (74%) list groundwater as their primary source.

Who owns and regulates Mccoy WSC?

EPA lists Mccoy WSC as owned by a local government. The TX state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 8 of the 12 active systems in Atascosa County (67%) are also owned by a local government.

Does Mccoy WSC have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in February 2021. The violations listed here began between August 2011 and February 2021. By type: 5 monitoring, 3 public notice, recordkeeping or other, 2 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (5 of them). 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
2021-02-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-01-01	Monitoring and reportingWater Quality Parameter M/R · code 53	Lead and Copper Rulecode 5000	No	Resolved
2017-12-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-11-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-10-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-09-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2012-10-10	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2012-07-12	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2012-06-01	Monitoring and reportingMonitoring, Source Water (GWR) · code 34	E. colicode 3014	No	Resolved
2012-06-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2011-10-12	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2011-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	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.

Mccoy WSC: frequently asked questions

Who runs Mccoy WSC?

Mccoy WSC (PWSID TX0070023) is a community water system owned by a local government. It is regulated by the TX state drinking water program.

How many people does Mccoy WSC serve?

Mccoy WSC reports serving 9,621 people through 3,207 service connections in Atascosa County, Texas.

Where does Mccoy WSC 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 Mccoy WSC have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in February 2021. 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 Mccoy WSC'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, 2 are health-based, and the most recent began in February 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.

Where can I find Mccoy WSC's water quality report?

As a community water system, Mccoy WSC 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 Atascosa County

Water system	County	Population served	Type	Source
City of Pleasanton	Atascosa	17,985	Community	Groundwater
City of Jourdanton	Atascosa	5,721	Community	Groundwater
City of Lytle	Atascosa	4,860	Community	Groundwater
City of Poteet	Atascosa	3,396	Community	Groundwater
City of Charlotte	Atascosa	2,247	Community	Groundwater
City of Christine	Atascosa	696	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, “Mccoy WSC, PWSID TX0070023, Texas”, https://aquacensus.com/water-systems/texas/mccoy-wsc-tx0070023 (data as of October 1, 2026).