Tap Water Lookup

County · Texas

Collin County, Texas: drinking water records

Explore EPA records for 35 community water systems across 29 ZIP codes in Collin County, then find water-testing resources and available recent monitoring-station readings.

In focus35Community 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 23 of the 35 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

23
systems in EPA's PFAS survey
23
systems where PFAS was found
0
systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses
5
systems that have reached the lead action level
6
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 35 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
City of Anna TX043002723,960360121.1 ppb
North Collin SUD TX043005510,716360111.9 ppb
City of Farmersville TX04300045,312120110.9 ppb
City of Plano TX0430007292,059120401.4 ppb
City of Frisco TX0430005231,910120402.3 ppb
City of Mckinney TX0430039224,043120100.9 ppb
City of Allen TX0430025113,746120400 ppb
City of Celina TX043000352,70195101.8 ppb
City of Wylie TX043001148,393120401.0 ppb
Town of Prosper TX043000942,598120602.0 ppb
City of Princeton TX043000837,019120102.2 ppb
City of Melissa TX043004026,234120101.4 ppb
Culleoka WSC TX043003024,615120200 ppb
City of Murphy TX043004221,082120400 ppb
East Fork SUD TX043003317,589120402.1 ppb
Bear Creek SUD TX043003715,822240501.1 ppb
Wylie Northeast SUD TX043005111,430120402 ppb
Town of Fairview TX043003411,100120201.3 ppb
City of Josephine TX04300369,800120401.3 ppb
Copeville SUD TX04300298,438240400 ppb
City of Lucas TX04300548,378240403.6 ppb
City of Parker TX04300456,486120401.2 ppb
Nevada SUD TX04300534,2182404010.4 ppb
Desert WSC TX04300322,0910010 ppb
Weston WSC TX04300501,1850010 ppb
North Farmersville WSC TX04300437470041.2 ppb
Verona SUD TX04300483,6720002.2 ppb
Milligan WSC TX04300413,3640000.9 ppb
North Custer Road Plant TX04300772,7540000 ppb
Frognot SUD TX04300352,6430000 ppb
Westminster SUD TX04300492,4240000 ppb
Seis Lagos Utility District TX04300572,0370000.9 ppb
City of Blue Ridge TX04300021,1890000 ppb
Air Park Estates TX0430060960000 ppb
North Texas MWD Wylie WTP TX0430044900001.3 ppb

USGS · Monitoring stations

The water, more recently.

Available station readings in Collin 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 Collin County

29ZIP 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

  • Allen
  • Anna
  • Blue Ridge
  • Celina
  • Dallas
  • Farmersville
  • Frisco
  • Josephine
  • Lucas
  • McKinney
  • Melissa
  • Murphy
  • Plano
  • Princeton
  • Prosper
  • Richardson
  • Wylie
Explore water-system recordsFind water-testing resources
View ZIP areas and understand coverage
  • 75002Lucas
  • 75009Celina
  • 75013Allen
  • 75023Plano
  • 75024Plano
  • 75025Plano
  • 75034Frisco
  • 75035Frisco
  • 75069McKinney
  • 75070McKinney
  • 75071McKinney
  • 75072McKinney
  • 75074Plano
  • 75075Plano
  • 75078Prosper
  • 75082Richardson
  • 75093Plano
  • 75094Murphy
  • 75098Wylie
  • 75164Josephine
  • 75166Wylie
  • 75173Wylie
  • 75252Dallas
  • 75287Dallas
  • 75407Princeton
  • 75409Anna
  • 75424Blue Ridge
  • 75442Farmersville
  • 75454Melissa

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 23 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter5 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 Collin 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