Public water system · TX1990010

Active

Mount Zion WSC

At a glance

Mount Zion WSC (PWSID TX1990010) is an active community water system in Rockwall County, Texas. It reports serving 2,028 people through 676 service connections. Its primary water source is purchased surface water, 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 April 2026.

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

Population served

2,028

Service connections

676

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDTX1990010

System typeCommunity water system

Activity statusActive

Population served2,028

Service connections676

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyTX state drinking water program

City served—

StateTexas

ZIP—

CountyRockwall County

How does Mount Zion WSC compare with other water systems in Rockwall County?

By EPA's size categories, Mount Zion WSC is a small system (501 to 3,300 people). Rockwall County has 7 active public water systems. Its population served is well below the county average of 19,339 people per system, and accounts for 1.5% of the 135,374 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 Mount Zion WSC 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. Texas has 4,594 active community water systems, 65% of the state's 7,078 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 1,192 Texas systems (17%) list purchased surface water as their primary source.

Who owns and regulates Mount Zion WSC?

EPA lists Mount Zion 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. 7 of the 7 active systems in Rockwall County (100%) are also owned by a local government.

Does Mount Zion 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 April 2026. The violations listed here began between February 2014 and April 2026. By type: 5 public notice, recordkeeping or other, 4 monitoring and reporting, 2 required treatment not met and 1 reporting. The contaminant or rule involved most often is Public Notice (5 of them). EPA lists 7 as resolved and 5 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2026-04-16	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2025-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Unaddressed
2025-05-15	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2024-10-17	ReportingLSL Reporting · code 4G	Lead and Copper Rule Revisionscode 5200	No	Resolved
2024-10-17	Required treatment not metLSL Inventory · code 2E	Lead and Copper Rule Revisionscode 5200	Yes	Resolved
2017-09-25	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2017-01-16	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2017-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2016-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2014-07-01	Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51	Lead and Copper Rulecode 5000	No	Resolved
2014-04-01	Required treatment not metOCCT/SOWT Study/Recommendation · code 57	Lead and Copper Rulecode 5000	Yes	Resolved
2014-02-21	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	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.

Mount Zion WSC: frequently asked questions

Who runs Mount Zion WSC?

Mount Zion WSC (PWSID TX1990010) is a community water system owned by a local government. It is regulated by the TX state drinking water program.

How many people does Mount Zion WSC serve?

Mount Zion WSC reports serving 2,028 people through 676 service connections in Rockwall County, Texas.

Where does Mount Zion WSC get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does Mount Zion 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 April 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 Mount Zion 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 April 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.

Where can I find Mount Zion WSC's water quality report?

As a community water system, Mount Zion 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 Rockwall County

Water system	County	Population served	Type	Source
City of Rockwall	Rockwall	55,250	Community	Purchased surface water
City of Fate	Rockwall	29,285	Community	Purchased surface water
City of Royse City	Rockwall	24,313	Community	Purchased surface water
City of Heath	Rockwall	10,464	Community	Purchased surface water
R C H WSC	Rockwall	7,863	Community	Purchased surface water
Blackland WSC	Rockwall	6,171	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, “Mount Zion WSC, PWSID TX1990010, Texas”, https://aquacensus.com/water-systems/texas/mount-zion-wsc-tx1990010 (data as of October 1, 2026).