County · Texas

Dallas County, Texas: drinking water records

Name: Drinking water records for Dallas County, Texas
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 34 community water systems across 85 ZIP codes in Dallas County, then find water-testing resources and available recent monitoring-station readings.

In focus34Community 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 26 of the 34 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

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

Water system	People served	PFAS survey results	PFAS found	Health-based violations	Lead, 9 in 10 homes at or below
City of Balch Springs TX0570032	28,300	240	5	1	0 ppbbelow the action level
City of Seagoville TX0570016	20,156	120	5	1	0 ppbbelow the action level
City of Wilmer TX0570018	7,296	240	4	1	0 ppbbelow the action level
Combine WSC TX0570039	3,588	120	4	1	1.9 ppbbelow the action level
Dallas Water Utility TX0570004	1,356,479	360	8	0	1.1 ppbbelow the action level
City of Irving TX0570050	264,546	360	8	0	1 ppbbelow the action level
City of Garland TX0570010	248,822	120	4	0	1.2 ppbbelow the action level
City of Grand Prairie TX0570048	201,843	600	8	0	1.2 ppbbelow the action level
City of Mesquite TX0570014	152,020	116	4	0	1.4 ppbbelow the action level
City of Carrollton TX0570034	136,170	480	4	0	0 ppbbelow the action level
City of Richardson TX0570015	122,615	120	4	0	2.4 ppbbelow the action level
City of Rowlett TX0570056	68,123	95	4	0	1.7 ppbbelow the action level
City of Desoto TX0570006	57,999	120	4	0	0 ppbbelow the action level
City of Cedar Hill TX0570036	50,904	120	4	0	0 ppbbelow the action level
City of Coppell TX0570040	43,193	120	4	0	0 ppbbelow the action level
City of Lancaster TX0570013	40,449	120	4	0	0 ppbbelow the action level
City of Farmers Branch TX0570047	40,246	120	6	0	0 ppbbelow the action level
City of Duncanville TX0570007	39,413	120	5	0	1.1 ppbbelow the action level
City of Sachse TX0570057	30,630	120	4	0	1.0 ppbbelow the action level
City of University Park TX0570061	25,617	120	8	0	1.4 ppbbelow the action level
City of Glenn Heights TX0570085	18,718	120	4	0	0 ppbbelow the action level
Town of Addison TX0570031	17,257	95	4	0	1.4 ppbbelow the action level
Town of Highland Park TX0570049	8,959	120	5	0	3.4 ppbbelow the action level
Town of Sunnyvale TX0570059	8,839	120	4	0	2.2 ppbbelow the action level
City of Hutchins TX0570012	5,902	120	4	0	0 ppbbelow the action level
City of Cockrell Hill TX0570038	3,855	120	8	0	0 ppbbelow the action level
Matthew Road WSC TX0570098	279	0	0	1	0 ppbbelow the action level
D Bar B Mobile Home Ranch TX0570082	267	0	0	21	0 ppbbelow the action level
Cottonwood Creek Mobile Home Park TX0570094	225	0	0	1	0 ppbbelow the action level
Parkerville East Mobile Home Park TX0570097	42	0	0	1	0 ppbbelow the action level
Lancaster MUD 1 TX0570176	2,685	0	0	0	2.1 ppbbelow the action level
Danieldale Community Water Service TX0570044	702	0	0	0	0 ppbbelow the action level
Dallas County MUD 4 TX0570186	150	0	0	0	0 ppbbelow the action level
Dallas County Park Cities MUD TX0570078	0	0	0	1	not reported

USGS · Monitoring stations

The water, more recently.

Available station readings in Dallas 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.

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 2026-09-15 · Source updated 2026-08-05

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 2026-09-15 · Source updated 2026-08-11

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 2026-09-15 · Source updated 2026-09-09

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 2026-09-15

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 Dallas County

85ZIP 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

Addison
Balch Springs
Carrollton
Cedar Hill
Coppell
Dallas
DeSoto
Duncanville
Farmers Branch
Garland
Grand Prairie
Highland Park
Hutchins
Irving
Lancaster
Mesquite
Richardson
Rowlett
Sachse
Seagoville
Sunnyvale
Wilmer

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

75001Addison
75006Carrollton
75019Coppell
75038Irving
75039Irving
75040Garland
75041Garland
75042Garland
75043Garland
75044Garland
75048Sachse
75050Grand Prairie
75051Grand Prairie
75052Grand Prairie
75054Grand Prairie
75060Irving
75061Irving
75062Irving
75063Irving
75080Richardson
75081Richardson
75088Rowlett
75089Rowlett
75104Cedar Hill
75115DeSoto
75116Duncanville
75134Lancaster
75137Duncanville
75141Hutchins
75146Lancaster
75149Mesquite
75150Mesquite
75159Seagoville
75172Wilmer
75180Balch Springs
75181Mesquite
75182Sunnyvale
75201Dallas
75202Dallas
75203Dallas
75204Dallas
75205Highland Park
75206Dallas
75207Dallas
75208Dallas
75209Dallas
75210Dallas
75211Dallas
75212Dallas
75214Dallas
75215Dallas
75216Dallas
75217Dallas
75218Dallas
75219Dallas
75220Dallas
75223Dallas
75224Dallas
75225Dallas
75226Dallas
75227Dallas
75228Dallas
75229Dallas
75230Dallas
75231Dallas
75232Dallas
75233Dallas
75234Farmers Branch
75235Dallas
75236Dallas
75237Dallas
75238Dallas
75240Dallas
75241Dallas
75243Dallas
75244Farmers Branch
75246Dallas
75247Dallas
75248Dallas
75249Dallas
75251Dallas
75253Dallas
75254Dallas
75270Dallas
75390Dallas

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 all 26 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter2 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Dallas 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.