Public water system · TX0310002
ActiveHarlingen Water Works System
At a glance
Harlingen Water Works System (PWSID TX0310002) is an active community water system in Cameron County, Texas. It reports serving 85,900 people through 37,154 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in November 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
85,900
Service connections
37,154
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Harlingen Water Works System compare with other water systems in Cameron County?
By EPA's size categories, Harlingen Water Works System is a large system (10,001 to 100,000 people). Cameron County has 30 active public water systems, and Harlingen Water Works System is the 2nd-largest of them by population served. Its population served is about 5.8 times the county average of 14,775 people per system, and accounts for 19% of the 443,241 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 Harlingen Water Works System is about 13 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 328 Texas systems (4.6%) list surface water as their primary source.
Who owns and regulates Harlingen Water Works System?
EPA lists Harlingen Water Works System 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. 21 of the 30 active systems in Cameron County (70%) are also owned by a local government.
Does Harlingen Water Works System have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in November 2020. The violations listed here began between July 1993 and November 2020. By type: 1 monitoring, 1 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Revised Total Coliform Rule and Surface Water Treatment Rule. EPA lists 2 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 2020-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 1993-07-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
All 3 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.
Harlingen Water Works System: frequently asked questions
Who runs Harlingen Water Works System?
Harlingen Water Works System (PWSID TX0310002) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does Harlingen Water Works System serve?
Harlingen Water Works System reports serving 85,900 people through 37,154 service connections in Cameron County, Texas.
Where does Harlingen Water Works System 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 Harlingen Water Works System have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in November 2020. 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 Harlingen Water Works System'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. EPA's records list 3 violations for this system; none is health-based, and the most recent began in November 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Harlingen Water Works System's water quality report?
As a community water system, Harlingen Water Works System 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 Cameron County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Brownsville Public Utilities Board | Cameron | 201,249 | Community | Surface water |
| Laguna Madre Water District | Cameron | 46,674 | Community | Surface water |
| East Rio Hondo WSC | Cameron | 24,756 | Community | Surface water |
| City of San Benito | Cameron | 24,250 | Community | Surface water |
| El Jardin WSC | Cameron | 9,423 | Community | Purchased surface water |
| Olmito WSC | Cameron | 8,952 | Community | 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, “Harlingen Water Works System, PWSID TX0310002, Texas”, https://aquacensus.com/water-systems/texas/harlingen-water-works-system-tx0310002 (data as of October 1, 2026).