Haloacetic acids (HAA5) above the legal limit in the period starting January 2026.
Serves about 4,605 people (1,792 connections) with surface water from its own intake.
From EPA's record for TX1230003. PurityMap is independent of Jefferson County WCID 10.
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10 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2026 | Haloacetic acids (HAA5) | 0.077 mg/L | 0.060 mg/L | Resolved |
| Jan–Mar 2026 | Total trihalomethanes (TTHM) | 0.088 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2025 | Haloacetic acids (HAA5) | 0.077 mg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2025 | Total trihalomethanes (TTHM) | 0.085 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2025 | Total trihalomethanes (TTHM) | 0.086 mg/L | 0.080 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jul–Sep 2025 | Haloacetic acids (HAA5) | 0.079 mg/L | 0.060 mg/L | Resolved |
| Apr–Jun 2025 | Total trihalomethanes (TTHM) | 0.088 mg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2025 | Haloacetic acids (HAA5) | 0.084 mg/L | 0.060 mg/L | Resolved |
| From October 2020 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| From October 2020 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from January 2024 to April 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorobutanoic acid (PFBA) | 5.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-01-16 to 2024-11-13 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2024-11-13 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2024-11-13 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2024-11-13 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2024-11-13 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-16 to 2025-04-07 | UCMR5 Analytical Results: JEFFERSON COUNTY WCID 10 (TX1230003) |
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
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Follow this water →Jefferson County WCID 10's phone number on EPA record is 409-722-6922. Its mailing address is 3707 CENTRAL BLVD, NEDERLAND, TX 77627-3225.
According to EPA's record, Jefferson County WCID 10 uses surface water from its own intake.
EPA's record shows 10 health-based violations for Jefferson County WCID 10 in the 10 years to July 9, 2026. Haloacetic acids (HAA5) were above the legal limit in the period starting January 2026. EPA also lists 3 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Jefferson County WCID 10's latest lead and copper round, which ended in June 2026, was 1.82 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Jefferson County WCID 10. Its phone number on EPA record is 409-722-6922. Its mailing address on EPA record is 3707 CENTRAL BLVD, NEDERLAND, TX 77627-3225. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.