No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting January 2019.
Serves about 26,026 people (13,438 connections) with surface water from its own intake.
From EPA's record for AZ0407017. PurityMap is independent of Epcor.
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1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2019 | Arsenic | 13 µg/L | 0.010 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 | 74.7 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 | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| 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 | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| 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 | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| 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 | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| 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 | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| 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 | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| 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 | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-12 to 2024-11-01 | UCMR5 Analytical Results: EPCOR - CHAPARRAL CITY (AZ0407017) |
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 →Epcor's phone number on EPA record is 623-445-2431. Its mailing address is 8700 N. EL MIRAGE RD., EL MIRAGE, AZ 85335.
According to EPA's record, Epcor uses surface water from its own intake.
EPA's record shows 1 health-based violation for Epcor 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 2019. EPA also lists 12 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 Epcor'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 Epcor. Its phone number on EPA record is 623-445-2431. Its mailing address on EPA record is 8700 N. EL MIRAGE RD., EL MIRAGE, AZ 85335. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.