Ellis County Water Quality: 4 Cities Ranked by the Records
Ellis County, Texas: 4 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.
Perfluorooctanoic acid (PFOA)Detected in 1 system of 4 tested4.0 ng/L federal MCL (2024) · US EPAHighest4.8 ng/L
- CITY OF MIDLOTHIAN4.8 ng/LSample date: 2023-12-11 to 2024-11-11
- CITY OF ENNISNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-03-15 to 2023-12-11
- CITY OF RED OAKNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-08-23 to 2024-04-15
- CITY OF WAXAHACHIENot detected · below 4.0 ng/L lab reporting limitSample date: 2023-11-21 to 2024-08-14
LithiumDetected in 2 systems of 4 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest10.9 µg/L
- CITY OF MIDLOTHIAN10.9 µg/LSample date: 2023-12-11 to 2024-09-23
- CITY OF WAXAHACHIE10 µg/LSample date: 2023-11-21 to 2024-08-14
- CITY OF ENNISNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-03-15 to 2023-12-11
- CITY OF RED OAKNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-05-03 to 2024-02-26
Lead (90th percentile)Detected in 1 system of 4 tested15 µg/L federal action level · US EPAHighest1.68 µg/L
- CITY OF MIDLOTHIAN1.68 µg/LMonitoring period: 2023–2025
- CITY OF ENNISNot detectedMonitoring period: 2023–2025
- CITY OF RED OAKNot detectedMonitoring period: 2024–2026 (still open)
- CITY OF WAXAHACHIENot detectedMonitoring period: 2023–2025
Perfluorobutanesulfonic acid (PFBS)Detected in 4 systems2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest7.2 ng/L
- CITY OF ENNIS7.2 ng/LSample date: 2023-03-15 to 2023-12-11
- CITY OF WAXAHACHIE7.1 ng/LSample date: 2023-11-21 to 2024-08-14
- CITY OF MIDLOTHIAN4.9 ng/LSample date: 2023-12-11 to 2024-11-11
- CITY OF RED OAK4.9 ng/LSample date: 2023-08-23 to 2024-04-15
Perfluorohexanoic acid (PFHxA)Detected in 4 systems400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest13.2 ng/L
- CITY OF ENNIS13.2 ng/LSample date: 2023-03-15 to 2023-12-11
- CITY OF MIDLOTHIAN9 ng/LSample date: 2023-12-11 to 2024-11-11
- CITY OF WAXAHACHIE8.7 ng/LSample date: 2023-11-21 to 2024-08-14
- CITY OF RED OAK5.8 ng/LSample date: 2023-08-23 to 2024-04-15
Perfluorobutanoic acid (PFBA)Detected in 4 systemsNo federal or state limit; shown for transparencyHighest12.4 ng/L
- CITY OF MIDLOTHIAN12.4 ng/LSample date: 2023-12-11 to 2024-11-11
- CITY OF ENNIS12 ng/LSample date: 2023-03-15 to 2023-12-11
- CITY OF WAXAHACHIE11.6 ng/LSample date: 2023-11-21 to 2024-08-14
- CITY OF RED OAK10.2 ng/LSample date: 2023-08-23 to 2024-04-15
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 4 testedNo federal or state limit; shown for transparencyHighest3.9 ng/L
- CITY OF MIDLOTHIAN3.9 ng/LSample date: 2023-12-11 to 2024-11-11
- CITY OF ENNISNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-15 to 2023-12-11
- CITY OF RED OAKNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-23 to 2024-04-15
- CITY OF WAXAHACHIENot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-21 to 2024-08-14
Perfluoropentanoic acid (PFPeA)Detected in 4 systemsNo federal or state limit; shown for transparencyHighest17.3 ng/L
- CITY OF ENNIS17.3 ng/LSample date: 2023-03-15 to 2023-12-11
- CITY OF WAXAHACHIE12.1 ng/LSample date: 2023-11-21 to 2024-08-14
- CITY OF MIDLOTHIAN10.1 ng/LSample date: 2023-12-11 to 2024-11-11
- CITY OF RED OAK6.1 ng/LSample date: 2023-08-23 to 2024-04-15
23 PFAS tested, none detected in any systemShow
Tested in these 4 systems: CITY OF ENNIS, CITY OF MIDLOTHIAN, CITY OF RED OAK, CITY OF WAXAHACHIE
- 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)
- Perfluorohexanesulfonic acid (PFHxS)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanesulfonic acid (PFOS)
- 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 4 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
- WaxahachieCITY OF WAXAHACHIE · TX070000850,814 served
- MidlothianCITY OF MIDLOTHIAN · TX070000527,699 served
- EnnisCITY OF ENNIS · TX070000124,891 served
- Red OakCITY OF RED OAK · TX070003118,577 served
Frequently asked
How does Ellis County tap water compare across cities?
PurityMap ranks 4 cities in Ellis 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 Waxahachie's main water system: CITY OF WAXAHACHIE · PWSID TX0700008 · 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 Ellis County cities had a PFAS sample above a 2024 EPA limit?
1 of 4 Ellis County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Midlothian (PFOA 4.8 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 4.
Is there lead in Ellis County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 4 Ellis 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.
Have Ellis County water systems had drinking-water violations?
1 city in Ellis County has a health-based violation in the federal SDWIS record within about the last ten years. Each city report lists the contaminant, year and whether it was resolved.
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