Tap Water Lookup

County · Texas

Cameron County, Texas: drinking water records

Explore EPA records for 21 community water systems across 16 ZIP codes in Cameron County, then find water-testing resources and available recent monitoring-station readings.

In focus21Community water systems
Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 10 of the 21 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

10
systems in EPA's PFAS survey
9
systems where PFAS was found
1
systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses
0
systems that have reached the lead action level
12
systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 21 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water systemPeople servedPFAS survey resultsPFAS foundHealth-based violationsLead, 9 in 10 homes at or below
East Rio Hondo WSC TX031009624,756360810 ppb
City of San Benito TX031000724,250240610 ppb
Olmito WSC TX03100268,952120510 ppb
City of la Feria TX03100037,226120421.6 ppb
City of Los Fresnos TX03100046,009120011.8 ppb
Brownsville Public Utilities Board TX0310001201,249240700 ppb
Harlingen Water Works System TX031000285,900240300 ppb
Laguna Madre Water District TX031000546,674240300 ppb
El Jardin WSC TX03100229,423120800 ppb
City of Primera TX03100945,811240500 ppb
Valley MUD 2 Rancho Viejo TX03100593,6440040 ppb
City of Combes TX03100212,8950030 ppb
City of Santa Rosa TX03100092,8830060 ppb
City of Rio Hondo TX03100062,64000460 ppb
Town of Indian Lake TX03100088880093.7 ppb
Carefree Valley Resort TX03101456000010 ppb
East Rio Hondo WSC Arroyo City TX03100311,9530000 ppb
City of Palm Valley TX03100271,3100001.1 ppb
Starbase Water System TX03101547430000 ppb
Military Hwy WSC del Mar Heights TX03101472130001.2 ppb
Southmost Regional Water Authority TX03101500001not reported

USGS · Monitoring stations

The water, more recently.

Available station readings in Cameron County, Texas. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

Station coverage and available measurements vary by county.

Explore USGS Water Data
How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Cameron County

16ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

  • Brownsville
  • Combes
  • Harlingen
  • Iglesia Antigua
  • La Feria
  • La Tina Ranch
  • Los Indios
  • San Benito
  • South Padre Island
  • Yznaga
Explore water-system recordsFind water-testing resources
View ZIP areas and understand coverage
  • 78520Brownsville
  • 78521Brownsville
  • 78526Brownsville
  • 78535Combes
  • 78550Harlingen
  • 78552Harlingen
  • 78559La Feria
  • 78566Brownsville
  • 78567Los Indios
  • 78575Brownsville
  • 78578Brownsville
  • 78583La Tina Ranch
  • 78586San Benito
  • 78592Iglesia Antigua
  • 78593Yznaga
  • 78597South Padre Island

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASChoosing a PFAS filterPFAS was found in 9 of the 10 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadLead in drinking waterHow EPA’s lead records work and what the action level means for a water system.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Cameron County

All Texas counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.

Keep exploring

Every record tells
part of the story.

Find a place. Read the measurements.
Understand the context.

Explore water records