Updated 2026-10-15

County water report

Brazos County Water Quality: 2 Cities Ranked by the Records

Name: Brazos County Water Quality Data (2026)
Creator: PurityMap
License: https://creativecommons.org/licenses/by/4.0/

Brazos County, Texas: 2 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my system Open on the map Private wells in Brazos County

Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

LithiumDetected in 2 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest22.8 µg/L

CITY OF BRYAN22.8 µg/LSample date: 2024-11-11 to 2025-05-21
CITY OF COLLEGE STATION18.6 µg/LSample date: 2023-05-23 to 2023-11-02

Lead (90th percentile)Detected in 1 system of 2 tested15 µg/L federal action level · US EPAHighest2.34 µg/L

CITY OF BRYAN2.34 µg/LMonitoring period: 2024–2026 (still open)
CITY OF COLLEGE STATIONNot detectedMonitoring period: 2023–2025

Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 2 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest3.7 ng/L

CITY OF COLLEGE STATION3.7 ng/LSample date: 2023-05-23 to 2023-11-02
CITY OF BRYANNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-05-21

Perfluorohexanoic acid (PFHxA)Detected in 1 system of 2 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest5.9 ng/L

CITY OF COLLEGE STATION5.9 ng/LSample date: 2023-05-23 to 2023-11-02
CITY OF BRYANNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-05-21

Perfluorobutanoic acid (PFBA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest8.9 ng/L

CITY OF COLLEGE STATION8.9 ng/LSample date: 2023-05-23 to 2023-11-02
CITY OF BRYANNot detected · below 5.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-05-21

Perfluoropentanoic acid (PFPeA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest5.6 ng/L

CITY OF COLLEGE STATION5.6 ng/LSample date: 2023-05-23 to 2023-11-02
CITY OF BRYANNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-05-21

25 PFAS tested, none detected in any systemShow

Tested in these 2 systems: CITY OF BRYAN, CITY OF COLLEGE STATION

11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorodecanoic acid (PFDA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorononanoic acid (PFNA)
Perfluorooctanesulfonic acid (PFOS)
Perfluorooctanoic acid (PFOA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)

2 cities

Cities ranked by the records

1
College StationCITY OF COLLEGE STATION
PFAS detected, within limit
Open city report →
2
BryanCITY OF BRYAN
No PFAS detectedLead below action level
Open city report →

Showing 2 of 2 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Brazos CountyPFAS detected in 1 of 2 cities; none had a sample above a 2024 EPA limit

4.0 ng/L federal MCL · PFOS, ng/LPFAS in Texas

Lead

0of 2 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Texas

Who supplies the county

Largest water systems

College StationCITY OF COLLEGE STATION · TX0210002
104,103 served
BryanCITY OF BRYAN · TX0210001
91,031 served

Questions

Frequently asked

How does Brazos County tap water compare across cities?

PurityMap ranks 2 cities in Brazos County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is College Station's main water system: CITY OF COLLEGE STATION · PWSID TX0210002 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Brazos County cities had a PFAS sample above a 2024 EPA limit?

None of the 2 Brazos County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 1.

Is there lead in Brazos County tap water?

Utilities report lead as a 90th-percentile result from home taps. 1 of 2 Brazos County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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