Coryell County Water Quality: 3 Cities Ranked by the Records
Coryell County, Texas: 3 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
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.
Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 3 tested4.0 ng/L federal MCL (2024) · US EPAHighest4.1 ng/L
- CITY OF COPPERAS COVE4.1 ng/LSample date: 2023-08-24 to 2024-05-23
- CITY OF GATESVILLENot detected · below 4.0 ng/L lab reporting limitSample date: 2024-03-20 to 2025-02-07
- US ARMY SOUTH FORT CAVAZOSNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-11-15 to 2024-08-15
Perfluorohexanesulfonic acid (PFHxS)Detected in 3 systems10 ng/L federal MCL (2024) · US EPAHighest4.3 ng/L
- CITY OF COPPERAS COVE4.3 ng/LSample date: 2023-08-24 to 2024-05-23
- US ARMY SOUTH FORT CAVAZOS4 ng/LSample date: 2023-11-15 to 2024-08-15
- CITY OF GATESVILLE3 ng/LSample date: 2024-03-20 to 2025-02-07
Lead (90th percentile)Detected in 1 system of 3 tested15 µg/L federal action level · US EPAHighest2.08 µg/L
- US ARMY SOUTH FORT CAVAZOS2.08 µg/LMonitoring period: 2024–2026 (still open)
- CITY OF COPPERAS COVENot detectedMonitoring period: 2023–2025
- CITY OF GATESVILLENot detectedMonitoring period: 2021–2023
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 3 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest3.5 ng/L
- CITY OF COPPERAS COVE3.5 ng/LSample date: 2023-08-24 to 2024-05-23
- US ARMY SOUTH FORT CAVAZOS3.2 ng/LSample date: 2023-11-15 to 2024-08-15
- CITY OF GATESVILLENot detected · below 3.0 ng/L lab reporting limitSample date: 2024-03-20 to 2025-02-07
Perfluorobutanoic acid (PFBA)Detected in 3 systemsNo federal or state limit; shown for transparencyHighest9 ng/L
- US ARMY SOUTH FORT CAVAZOS9 ng/LSample date: 2023-11-15 to 2024-08-15
- CITY OF COPPERAS COVE6.3 ng/LSample date: 2023-08-24 to 2024-05-23
- CITY OF GATESVILLE5 ng/LSample date: 2024-03-20 to 2025-02-07
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 3 testedNo federal or state limit; shown for transparencyHighest4 ng/L
- US ARMY SOUTH FORT CAVAZOS4 ng/LSample date: 2023-11-15 to 2024-08-15
- CITY OF COPPERAS COVE3.3 ng/LSample date: 2023-08-24 to 2024-05-23
- CITY OF GATESVILLENot detected · below 3.0 ng/L lab reporting limitSample date: 2024-03-20 to 2025-02-07
25 substances tested, none detected in any systemShow
Tested in these 3 systems: CITY OF COPPERAS COVE, CITY OF GATESVILLE, US ARMY SOUTH FORT CAVAZOS
- 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)
- Lithium
- 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)
- Perfluorohexanoic acid (PFHxA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
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.
0of 3 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 TexasLargest water systems
- Copperas CoveCITY OF COPPERAS COVE · TX050000141,669 served
- Fort HoodUS ARMY SOUTH FORT CAVAZOS · TX014010735,669 served
- GatesvilleCITY OF GATESVILLE · TX050000216,135 served
Frequently asked
How does Coryell County tap water compare across cities?
PurityMap ranks 3 cities in Coryell 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 Gatesville's main water system: CITY OF GATESVILLE · PWSID TX0500002 · Purity Score 95 (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 Coryell County cities had a PFAS sample above a 2024 EPA limit?
1 of 3 Coryell County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Copperas Cove (PFOS 4.1 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 3.
Is there lead in Coryell County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 3 Coryell 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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