No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting January 2021.
Serves about 4,774 people (1,735 connections) with surface water from its own intake.
From EPA's record for CA0510001. PurityMap is independent of Union Public Utility District.
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5 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2021 | Total trihalomethanes (TTHM) | 0.088 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2021 | Total trihalomethanes (TTHM) | 0.089 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2020 | Total trihalomethanes (TTHM) | 0.091 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2020 | Total trihalomethanes (TTHM) | 0.09 mg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2020 | Total trihalomethanes (TTHM) | 0.082 mg/L | 0.080 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2024 to November 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 50 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 | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| 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 | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| 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 | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| 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 | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| 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 | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| 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 | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| 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 | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-06 to 2024-11-04 | UCMR5 Analytical Results: UNION PUBLIC UTILITY DISTRICT (CA0510001) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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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 →Union Public Utility District's phone number on EPA record is 209-728-3651. Its mailing address is 339 MAIN STREET, MURPHYS, CA 95247.
According to EPA's record, Union Public Utility District uses surface water from its own intake.
EPA's record shows 5 health-based violations for Union Public Utility District in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting January 2021. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Union Public Utility District's latest lead and copper round, which ended in December 2023. The federal action level is 15 µg/L.
PurityMap has no verified website for Union Public Utility District. Its phone number on EPA record is 209-728-3651. Its mailing address on EPA record is 339 MAIN STREET, MURPHYS, CA 95247. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.