Arsenic above the legal limit in the period starting January 2026.
Serves about 5,353 people (2,197 connections) with groundwater from its own wells.
From EPA's record for TX0730004. PurityMap is independent of Tri County SUD.
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112 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2026 | Arsenic | 0.015 mg/L | 0.010 mg/L | Archived |
| From January 2026 | Arsenic | 0.02 mg/L | 0.010 mg/L | Archived |
| From January 2026 | Arsenic | 0.021 mg/L | 0.010 mg/L | Archived |
| From October 2025 | Arsenic | 0.015 mg/L | 0.010 mg/L | Archived |
| From October 2025 | Arsenic | 0.021 mg/L | 0.010 mg/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2025 | Arsenic | 0.022 mg/L | 0.010 mg/L | Archived |
| From July 2025 | Arsenic | 0.021 mg/L | 0.010 mg/L | Archived |
| From July 2025 | Arsenic | 0.014 mg/L | 0.010 mg/L | Archived |
| From July 2025 | Arsenic | 0.021 mg/L | 0.010 mg/L | Archived |
| From April 2025 | Arsenic | 0.02 mg/L | 0.010 mg/L | Archived |
| From April 2025 | Arsenic | 0.014 mg/L | 0.010 mg/L | Archived |
| From April 2025 | Arsenic | 0.02 mg/L | 0.010 mg/L | Archived |
| From January 2025 | Arsenic | 0.019 mg/L | 0.010 mg/L | Archived |
| From January 2025 | Arsenic | 0.021 mg/L | 0.010 mg/L | Archived |
| From January 2025 | Arsenic | 0.014 mg/L | 0.010 mg/L | Archived |
| From October 2024 | Arsenic | 0.014 mg/L | 0.010 mg/L | Archived |
| From October 2024 | Arsenic | 0.02 mg/L | 0.010 mg/L | Archived |
| From October 2024 | Arsenic | 0.02 mg/L | 0.010 mg/L | Archived |
| From July 2024 | Arsenic | 0.014 mg/L | 0.010 mg/L | Archived |
| From July 2024 | Arsenic | 0.02 mg/L | 0.010 mg/L | Archived |
| From July 2024 | Arsenic | 0.019 mg/L | 0.010 mg/L | Archived |
| From April 2024 | Arsenic | 0.014 mg/L | 0.010 mg/L | Archived |
| From April 2024 | Arsenic | 0.021 mg/L | 0.010 mg/L | Archived |
| From April 2024 | Arsenic | 0.02 mg/L | 0.010 mg/L | Archived |
| From January 2024 | Arsenic | 0.021 mg/L | 0.010 mg/L | Archived |
EPA required this system to test for 30 unregulated and emerging contaminants, from April 2023 to November 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 325 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-04-03 to 2023-10-18 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| 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 | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| 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 | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| 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 | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| 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 | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| 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 | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| 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 | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-03 to 2023-11-29 | UCMR5 Analytical Results: TRI COUNTY SUD (TX0730004) |
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Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
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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.
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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 →Tri County SUD's phone number on EPA record is 254-803-3553. Its mailing address is PO BOX 976, MARLIN, TX 76661-0976.
According to EPA's record, Tri County SUD uses groundwater from its own wells.
EPA's record shows 112 health-based violations for Tri County SUD in the 10 years to July 9, 2026. Arsenic was above the legal limit in the period starting January 2026. EPA also lists 2 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Tri County SUD's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Tri County SUD. Its phone number on EPA record is 254-803-3553. Its mailing address on EPA record is PO BOX 976, MARLIN, TX 76661-0976. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.