Short answer: No measured result is above a legal limit; lithium sits above a screening level, and a past health-based violation (Arsenic) is on record. Cottonwood Municipal Water Cw1 serves 11,288 residents.
This report uses the largest, COTTONWOOD MUNICIPAL WATER CW1. Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
COTTONWOOD MUNICIPAL WATER CW1 (EPA PWSID AZ0413025) delivers groundwater to 11,288 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
2health-based violations in the last 10 years
From EPA SDWIS. Counted once per contaminant per year, as in the Track record score. All 4 EPA filings are listed below.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Every filing is listed; the Track record score counts at most one per contaminant per year.
Resolved
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A tap test can confirm levels at your home before you choose treatment.
PFPeA 3.2 ng/L detected (no federal or state limit)
Lithium 51.5 µg/L, above the 10.0 µg/L EPA health reference level
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
Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
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.
When your results arrive, read them here →
Each card names which Cottonwood findings its current certification covers, and which it doesn't.
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No product in our catalogue has verified certification for these concerns yet.
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Cottonwood, PFPeA 3.2 ng/L was detected, with no federal or state limit; one health-based violation is on record (Arsenic). COTTONWOOD MUNICIPAL WATER CW1 (PWSID AZ0413025) has a Purity Score of 98/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
COTTONWOOD MUNICIPAL WATER CW1 (PWS ID AZ0413025) is the public water system on record for Cottonwood, Arizona, serving about 11,288 people. Confirm the utility on your water bill before acting on a specific finding.
Groundwater (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2025-03-10 to 2025-09-16), PFPeA was detected at 3.2 ng/L. It has no federal or state limit, so PurityMap shows it without grading it. No PFAS with a limit was detected.
Lead is not in Cottonwood's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
The federal SDWIS record lists a health-based violation for COTTONWOOD MUNICIPAL WATER CW1 within about the last ten years: Arsenic (2021). The findings above show each one's status.
PurityMap's current record for Cottonwood holds 32 findings: 2 above a reference, 1 detected with no limit and 29 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | 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) |
| Arsenic | 0.012 MG/L | 0.010 mg/L | Above the listed reference | 2021 | EPA SDWIS Violations & Enforcement: 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) |
| Contaminant | Result | Benchmark | 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 | 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) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2024–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: 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) |
Perfluoropentanoic acid (PFPeA)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025)
US EPA SDWIS
State SDWIS Compliance Record
EPA SDWIS Violations & Enforcement: COTTONWOOD MUNICIPAL WATER CW1 (AZ0413025)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Cottonwood Municipal Water Cw1 reported something related, it's shown below.
Lead at Cottonwood Municipal Water Cw1: not detected (90th percentile, 2024–2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.