County · Texas
Grayson County, Texas: drinking water records
Explore EPA records for 40 community water systems across 17 ZIP codes in Grayson County, then find water-testing resources and available recent monitoring-station readings.
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 8 of the 40 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
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 40 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 Sherman TX0910006 | 43,645 | 660 | 3 | 0 | 0 ppbbelow the action level |
| City of Denison TX0910003 | 27,500 | 120 | 0 | 0 | 1.8 ppbbelow the action level |
| City of Van Alstyne TX0910009 | 7,000 | 360 | 1 | 0 | 0.8 ppbbelow the action level |
| Two Way SUD TX0910022 | 6,804 | 331 | 1 | 0 | 0 ppbbelow the action level |
| South Grayson SUD TX0910064 | 6,750 | 300 | 1 | 0 | 7.5 ppbbelow the action level |
| Tanglewood on Texoma TX0910052 | 4,341 | 300 | 6 | 0 | 0 ppbbelow the action level |
| Luella SUD TX0910032 | 4,200 | 480 | 0 | 0 | 0 ppbbelow the action level |
| City of Whitesboro TX0910010 | 4,192 | 211 | 0 | 0 | 0 ppbbelow the action level |
| Northwest Grayson County WCID 1 TX0910137 | 3,615 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Rra Preston Shores Water System TX0910037 | 2,277 | 0 | 0 | 55 | 0.5 ppbbelow the action level |
| City of Bells TX0910001 | 2,101 | 0 | 0 | 1 | 1.1 ppbbelow the action level |
| Ridgecrest Water System TX0910035 | 1,968 | 0 | 0 | 31 | 3.3 ppbbelow the action level |
| City of Whitewright TX0910011 | 1,638 | 0 | 0 | 1 | 0 ppbbelow the action level |
| City of Southmayd TX0910045 | 489 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Northern Hills Water Service TX0910126 | 264 | 0 | 0 | 1 | 1.8 ppbbelow the action level |
| American Legion Mia Post 231 TX0910153 | 141 | 0 | 0 | 1 | 1.3 ppbbelow the action level |
| Munson Point Property Owners Association TX0910140 | 87 | 0 | 0 | 2 | 0 ppbbelow the action level |
| City of Howe TX0910013 | 4,548 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Kentuckytown WSC TX0910060 | 4,083 | 0 | 0 | 0 | 2.1 ppbbelow the action level |
| Oak Ridge South Gale WSC TX0910033 | 3,153 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Starr WSC TX0910046 | 3,100 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Marilee Elmont TX0910055 | 3,021 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Pottsboro TX0910004 | 2,874 | 0 | 0 | 0 | 3.8 ppbbelow the action level |
| Pink Hill WSC TX0910034 | 2,835 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Gunter TX0910012 | 2,772 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Sherwood Shores TX0910040 | 2,031 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Collinsville TX0910005 | 1,866 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Dorchester TX0910028 | 1,696 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Knollwood TX0910146 | 1,675 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Tioga TX0910007 | 938 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Tom Bean TX0910008 | 799 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Southmayd Westview Subdivision TX0910048 | 738 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Rock Creek Resort TX0910147 | 513 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Sadler TX0910014 | 483 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Rocky Point Estates TX0910038 | 441 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Thompson Heights Water System TX0910085 | 414 | 0 | 0 | 0 | 2.1 ppbbelow the action level |
| Texoma Estates WSC TX0910047 | 216 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| Heritage Estates TX0910139 | 138 | 0 | 0 | 0 | 0 ppbbelow the action level |
| 3-D Mobile Home and RV Park TX0910072 | 90 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Greater Texoma Utility Authority TX0910148 | 0 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Grayson 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.
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.
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.
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.
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 reportsResource 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 Grayson County
17ZIP 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
- Bells
- Collinsville
- Denison
- Gunter
- Howe
- Preston
- Sadler
- Sherman
- Sherwood Shores
- Southmayd
- Tom Bean
- Van Alstyne
- Whitesboro
- Whitewright
View ZIP areas and understand coverage
- 75020Denison
- 75021Denison
- 75058Gunter
- 75076Preston
- 75090Sherman
- 75092Sherman
- 75414Bells
- 75459Howe
- 75489Tom Bean
- 75491Whitewright
- 75495Van Alstyne
- 76233Collinsville
- 76245Sherwood Shores
- 76264Sadler
- 76268Southmayd
- 76271Gunter
- 76273Whitesboro
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.
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.