No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting April 2021.
Serves about 11,023 people (4,409 connections) with groundwater from its own wells.
From EPA's record for AZ0413025. PurityMap is independent of Cottonwood Municipal Water Cw1.
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4 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From April 2021 | Arsenic | 0.012 mg/L | 0.010 mg/L | Resolved |
| From January 2021 | Arsenic | 0.011 mg/L | 0.010 mg/L | Resolved |
| From January 2021 | Arsenic | 0.011 mg/L | 0.010 mg/L | Resolved |
| From October 2020 | Arsenic | 0.011 mg/L | 0.010 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2025 to September 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 51.5 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 | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoropentanoic acid (PFPeA) | 3.2 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| 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 | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| 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 | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| 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 | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| 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 | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| 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 | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| 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 | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-16 | UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025) |
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 →Cottonwood Municipal Water Cw1's phone number on EPA record is 928-340-2750. Its mailing address is 3827 E VAQUERO LN, COTTONWOOD, AZ 86326.
According to EPA's record, Cottonwood Municipal Water Cw1 uses groundwater from its own wells.
EPA's record shows 4 health-based violations for Cottonwood Municipal Water Cw1 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 April 2021. EPA also lists 6 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 Cottonwood Municipal Water Cw1'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 Cottonwood Municipal Water Cw1. Its phone number on EPA record is 928-340-2750. Its mailing address on EPA record is 3827 E VAQUERO LN, COTTONWOOD, AZ 86326. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.