No health-based violations on EPA record since 2016.
Serves about 13,000 people (1,459 connections) with groundwater from its own wells.
From EPA's record for CA3610031. PurityMap is independent of Muscoy MWC No. 1.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2024 to August 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| 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 | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| 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 | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| 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 | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| 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 | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| 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 | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| 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 | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-22 to 2024-08-12 | UCMR5 Analytical Results: MUSCOY MWC NO. 1 (CA3610031) |
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.
Get PurityMap updates about this water system.
Follow this water →Muscoy MWC No. 1's phone number on EPA record is 909-887-2964. Its mailing address is 2167 DARBY STREET, SAN BERNARDINO, CA 92407.
According to EPA's record, Muscoy MWC No. 1 uses groundwater from its own wells.
No health-based violations on EPA record since 2016. EPA also lists 16 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 Muscoy MWC No. 1'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 Muscoy MWC No. 1. Its phone number on EPA record is 909-887-2964. Its mailing address on EPA record is 2167 DARBY STREET, SAN BERNARDINO, CA 92407. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.