Official EPA SDWIS Statewide AnalysisState Water Quality & Testing Directory
Texas Drinking Water Quality & Testing Directory
Comprehensive EPA compliance records, water testing guidelines, and city rankings covering all 2,649 ZIP codes across Texas
Quick Summary: Is Tap Water Safe in Texas?
Drinking water in Texas receives an average composite safety score of 82.5/100 based on EPA Safe Drinking Water Act records. Approximately 50% of monitored ZIP codes earn an "A" grade. Water sources are 69% surface water and 31% groundwater, resulting in Moderately Soft to Moderate mineral hardness across the state.
Total ZIP Codes
2,649
Health Violations (5yr)
5,329
Statewide Avg Score
82.5/100
High Lead Risk Areas
34.7%
Overview: Drinking Water in Texas
Drinking water quality in Texas averages a composite safety score of 82.5/100 across its 2,649 monitored ZIP codes. Approximately 50% of ZIP codes in the state receive an "A" grade, while 0% receive an "F" grade. Environmental standards are enforced by Texas Commission on Environmental Quality (TCEQ).
Surface Water
69%
of ZIP codes
Total Violations
21,910
5-year record
Grade A ZIPs
1316
50% of state
Grade F ZIPs
6
0% of state
Water Quality Grade Distribution in Texas
How do Texas's 2,649 ZIP codes stack up by water quality grade?
A
1,316 ZIP codes50%
B
832 ZIP codes31%
C
421 ZIP codes16%
D
74 ZIP codes3%
F
6 ZIP codes0%
Popular Cities in Texas
Click any city to view ZIP code-level water quality reports
Houston
190 ZIPs
A
El Paso
138 ZIPs
A
Dallas
120 ZIPs
A
San Antonio
86 ZIPs
A
Austin
80 ZIPs
A
Fort Worth
56 ZIPs
A
Corpus Christi
37 ZIPs
A
Amarillo
28 ZIPs
B
Lubbock
27 ZIPs
D
Arlington
19 ZIPs
A
Waco
17 ZIPs
A
Tyler
15 ZIPs
A
Beaumont
14 ZIPs
B
Spring
12 ZIPs
B
Irving
11 ZIPs
A
Midland
11 ZIPs
A
Denton
10 ZIPs
A
Abilene
10 ZIPs
A
Plano
9 ZIPs
A
Garland
9 ZIPs
A
Longview
9 ZIPs
A
Odessa
9 ZIPs
D
Wichita Falls
8 ZIPs
C
Killeen
8 ZIPs
A
Conroe
8 ZIPs
B
Huntsville
8 ZIPs
C
Pasadena
8 ZIPs
B
Laredo
8 ZIPs
C
San Angelo
7 ZIPs
B
Bryan
7 ZIPs
A
Texarkana
6 ZIPs
B
Temple
6 ZIPs
A
Katy
6 ZIPs
B
Galveston
6 ZIPs
B
College Station
6 ZIPs
A
Round Rock
6 ZIPs
A
Grand Prairie
5 ZIPs
B
Richardson
5 ZIPs
C
Mesquite
5 ZIPs
A
Lufkin
5 ZIPs
B
City A-Z Directory — Texas
Browse water quality reports for every town and city in Texas.
🏆 Highest Rated ZIP Codes in Texas
⚠ Lowest Rated ZIP Codes in Texas
Common Drinking Water Contaminants in Texas
The following are common regulated contaminants found in Texas drinking water based on EPA violation records. Click any contaminant to learn about EPA safety limits and health effects.
Stage 2 DBP RuleFecal ColiformHaloacetic Acids (HAA5)Stage 1 DBP RuleBariumConsumer Confidence Report RuleContaminant 0800Lead
Source: EPA Safe Drinking Water Act Maximum Contaminant Level regulations. For the complete list of regulated contaminants and MCLs, see the Water Quality Safety Guide.
Frequently Asked Questions — Texas Drinking Water
Is tap water generally safe to drink in Texas?+
Yes, for the majority of residents, tap water in Texas is treated and regulated. However, compliance varies by city. State-wide, 1316 ZIP codes receive an "A" grade, while 6 receive an "F". Search your specific ZIP code to see your local utility's record.
How do I test water quality or well water in Texas?+
Residents in Texas can test their tap or well water by contacting laboratories certified by Texas Commission on Environmental Quality (TCEQ) or ordering an EPA-standard laboratory water testing kit. Annual testing is recommended for private wells to test for bacteria, nitrates, and heavy metals.
What are the biggest water quality issues in Texas?+
The primary issues include managing 5,329 health-based violations state-wide and resolving infrastructure age. 34.7% of ZIP codes in the state have a high probability of lead exposure risk due to pre-1986 piping.
Who regulates and enforces drinking water standards in Texas?+
Drinking water in Texas is regulated by Texas Commission on Environmental Quality (TCEQ) under a primacy agreement with the U.S. EPA.
Where does Texas get its drinking water?+
Approximately 69% of monitored areas in Texas rely on surface water sources (lakes/rivers), while the rest use groundwater aquifers.
How do I find the official water quality report for my home in Texas?+
Search your ZIP code on our site to view data compiled from EPA records, or contact your local utility for their annual Consumer Confidence Report (CCR).
View All 2,649 ZIP Codes in Texas
Browse EPA water quality data for every monitored ZIP code. For faster results, use the search bar above.
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All 2,649 ZIP codes in Texas are actively monitored under the EPA Safe Drinking Water Act.