- PWSID
- AZ0407088
- State
- Arizona
- System type
- community water system (CWS)
- Population served
- 96,130
- City
- Avondale
- Counties
- Maricopa County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2024-04-17 to 2025-01-08 · 6 entry point(s) · water types: GW;MX
- Service-area boundary
- authoritative
PFOA ≥ 3 × its limit highest single result
PFOA ≥ 3 × its limit worst entry-point average
Open on the Arizona map · All Arizona systems · All results
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Water purchased from
- Phoenix City Of (AZ0407025)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0.008 · detected: PFBA;PFBS
Seller results are the seller's own entry-point samples, not measurements of this system's water. This system's own samples (below) may reflect purchased water, its own sources, or both.
Compared with EPA's 2024 values
| Highest single result | Worst entry-point average* | Limit | |
|---|---|---|---|
| PFOA (ppt) | 13.5 | 12.2 | 4 |
| PFOS (ppt) | 11.7 | 10.25 | 4 |
| Hazard Index | 0.944 | 0.893 | 1.0† |
“<MRL” = every result for the compound was below its reporting limit. * Mean of all samples at each entry point with non-detects = 0 (EPA compliance convention; the Hazard Index also uses non-detects = 0); a screening comparison, not a formal running annual average. † Rescission proposed May 2026. PFOA/PFOS MCL 4 ppt (2024 NPDWR, in effect). PFHxS, PFNA, HFPO-DA (10 ppt each) and the Hazard Index (1.0) are 2024 NPDWR values; EPA proposed rescinding them on 18 May 2026 (comment period closed 20 Jul 2026).
No Arizona PFAS drinking-water standard in effect or proposed as of 2026-10-17: No Arizona-specific PFAS drinking-water standard; ADEQ adopts federal drinking-water rules by reference (A.A.C. Title 18, Ch. 4).
Sampling history
Sampled 2024-04-17 to 2025-01-08 · 6 entry point(s) · water types: GW;MX · 20 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2024-04-17 | EPDS001 (GW) | SE1 | 10.9 | 9.9 | 0.843 | PFHpA 3.2, PFHxA 5.8, PFPeA 5.4, lithium 58.2 µg/L |
| 2024-04-17 | EPDS004 (GW) | SE1 | 5.3 | 5.9 | 0.005 | PFHxA 6.3, PFPeA 7.5, lithium 62 µg/L |
| 2024-04-17 | EPDS005 (GW) | SE1 | 4.2 | 5 | 0.005 | PFHxA 6.6, PFPeA 7.6, lithium 54.5 µg/L |
| 2024-04-17 | EPDS007 (GW) | SE1 | <4 | <4 | 0 | lithium 65.2 µg/L |
| 2024-04-17 | EPDS010 (GW) | SE1 | 6 | <4 | 0.007 | PFBA 5.4, PFHxA 11.2, PFPeA 14.3, lithium 40.7 µg/L |
| 2024-04-22 | EPDS008 (MX) | SE1 | <4 | <4 | 0.004 | lithium 111 µg/L |
| 2024-07-16 | EPDS008 (MX) | SE2 | <4 | <4 | 0.004 | lithium 114 µg/L |
| 2024-10-14 | EPDS001 (GW) | SE2 | 13.5 | 10.6 | 0.944 | PFHpA 3.7, PFHxA 7.5, PFPeA 6.9 |
| 2024-10-14 | EPDS004 (GW) | SE2 | 8.1 | 11.7 | 0.607 | PFBA 5.2, PFHxA 7.8, PFPeA 8.7 |
| 2024-10-14 | EPDS005 (GW) | SE2 | 5.3 | 6 | 0.335 | PFHxA 7.9, PFPeA 9.3 |
| 2024-10-14 | EPDS007 (GW) | SE2 | <4 | <4 | 0 | none |
| 2024-10-14 | EPDS008 (MX) | SE3 | <4 | <4 | 0.005 | none |
| 2024-10-14 | EPDS010 (GW) | SE2 | 7.1 | 4.2 | 0.008 | PFBA 6.5, PFHxA 12.9, PFPeA 17.2 |
| 2024-10-21 | EPDS001 (GW) | SE2 | n/a | n/a | n/a | lithium 63.5 µg/L |
| 2024-10-21 | EPDS004 (GW) | SE2 | n/a | n/a | n/a | lithium 67.6 µg/L |
| 2024-10-21 | EPDS005 (GW) | SE2 | n/a | n/a | n/a | lithium 60.7 µg/L |
| 2024-10-21 | EPDS007 (GW) | SE2 | n/a | n/a | n/a | lithium 71.8 µg/L |
| 2024-10-21 | EPDS008 (MX) | SE3 | n/a | n/a | n/a | lithium 109 µg/L |
| 2024-10-21 | EPDS010 (GW) | SE2 | n/a | n/a | n/a | lithium 44.5 µg/L |
| 2025-01-08 | EPDS008 (MX) | SE4 | <4 | <4 | 0.002 | lithium 67.4 µg/L |
“<4” = not detected at the reporting limit shown; “n/a” = not analyzed in that sample. Highlighted = at or above the 4 ppt MCL. HI computed per sample with non-detects as 0. Other detections lists every other quantified compound (lithium in µg/L).
All results by entry point
420 results. Each column is one sampling visit (date and UCMR 5 sample event). A number is a measured concentration; “< 4” = below the minimum reporting level shown; “–” = not analyzed in that visit. PFAS in ppt (ng/L); lithium in µg/L.
EPDS001 facility 00115 · sample point EPDS001 · groundwater
| Compound | MRL | 2024-04-17 SE1 | 2024-10-14 SE2 | 2024-10-21 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | 6.3 | 7.2 | – |
| PFHpA | 3 ppt | 3.2 | 3.7 | – |
| PFHxA | 3 ppt | 5.8 | 7.5 | – |
| PFHxS | 3 ppt | 8.4 | 9.4 | – |
| PFOA | 4 ppt | 10.9 | 13.5 | – |
| PFOS | 4 ppt | 9.9 | 10.6 | – |
| PFPeA | 3 ppt | 5.4 | 6.9 | – |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | < 3 | < 3 | – |
| 6:2 FTS | 5 ppt | < 5 | < 5 | – |
| 8:2 FTS | 5 ppt | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 | – |
| ADONA | 3 ppt | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – |
| NFDHA | 20 ppt | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – |
| PFBA | 5 ppt | < 5 | < 5 | – |
| PFDA | 3 ppt | < 3 | < 3 | – |
| PFDoA | 3 ppt | < 3 | < 3 | – |
| PFEESA | 3 ppt | < 3 | < 3 | – |
| PFHpS | 3 ppt | < 3 | < 3 | – |
| PFMBA | 3 ppt | < 3 | < 3 | – |
| PFMPA | 4 ppt | < 4 | < 4 | – |
| PFNA | 4 ppt | < 4 | < 4 | – |
| PFPeS | 4 ppt | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | – |
| PFUnA | 2 ppt | < 2 | < 2 | – |
| lithium | 9 µg/L | 58.2 | – | 63.5 |
EPDS004 facility 00116 · sample point EPDS004 · groundwater
| Compound | MRL | 2024-04-17 SE1 | 2024-10-14 SE2 | 2024-10-21 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | < 5 | 5.2 | – |
| PFBS | 3 ppt | 11 | 13.2 | – |
| PFHxA | 3 ppt | 6.3 | 7.8 | – |
| PFHxS | 3 ppt | < 3 | 6 | – |
| PFOA | 4 ppt | 5.3 | 8.1 | – |
| PFOS | 4 ppt | 5.9 | 11.7 | – |
| PFPeA | 3 ppt | 7.5 | 8.7 | – |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | < 3 | < 3 | – |
| 6:2 FTS | 5 ppt | < 5 | < 5 | – |
| 8:2 FTS | 5 ppt | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 | – |
| ADONA | 3 ppt | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – |
| NFDHA | 20 ppt | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – |
| PFDA | 3 ppt | < 3 | < 3 | – |
| PFDoA | 3 ppt | < 3 | < 3 | – |
| PFEESA | 3 ppt | < 3 | < 3 | – |
| PFHpA | 3 ppt | < 3 | < 3 | – |
| PFHpS | 3 ppt | < 3 | < 3 | – |
| PFMBA | 3 ppt | < 3 | < 3 | – |
| PFMPA | 4 ppt | < 4 | < 4 | – |
| PFNA | 4 ppt | < 4 | < 4 | – |
| PFPeS | 4 ppt | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | – |
| PFUnA | 2 ppt | < 2 | < 2 | – |
| lithium | 9 µg/L | 62 | – | 67.6 |
EPDS005 facility 09186 · sample point EPDS005 · groundwater
| Compound | MRL | 2024-04-17 SE1 | 2024-10-14 SE2 | 2024-10-21 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | 9.5 | 10.9 | – |
| PFHxA | 3 ppt | 6.6 | 7.9 | – |
| PFHxS | 3 ppt | < 3 | 3.3 | – |
| PFOA | 4 ppt | 4.2 | 5.3 | – |
| PFOS | 4 ppt | 5 | 6 | – |
| PFPeA | 3 ppt | 7.6 | 9.3 | – |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | < 3 | < 3 | – |
| 6:2 FTS | 5 ppt | < 5 | < 5 | – |
| 8:2 FTS | 5 ppt | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 | – |
| ADONA | 3 ppt | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – |
| NFDHA | 20 ppt | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – |
| PFBA | 5 ppt | < 5 | < 5 | – |
| PFDA | 3 ppt | < 3 | < 3 | – |
| PFDoA | 3 ppt | < 3 | < 3 | – |
| PFEESA | 3 ppt | < 3 | < 3 | – |
| PFHpA | 3 ppt | < 3 | < 3 | – |
| PFHpS | 3 ppt | < 3 | < 3 | – |
| PFMBA | 3 ppt | < 3 | < 3 | – |
| PFMPA | 4 ppt | < 4 | < 4 | – |
| PFNA | 4 ppt | < 4 | < 4 | – |
| PFPeS | 4 ppt | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | – |
| PFUnA | 2 ppt | < 2 | < 2 | – |
| lithium | 9 µg/L | 54.5 | – | 60.7 |
EPDS007 facility 16996 · sample point EPDS007 · groundwater
| Compound | MRL | 2024-04-17 SE1 | 2024-10-14 SE2 | 2024-10-21 SE2 |
|---|---|---|---|---|
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | < 3 | < 3 | – |
| 6:2 FTS | 5 ppt | < 5 | < 5 | – |
| 8:2 FTS | 5 ppt | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 | – |
| ADONA | 3 ppt | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – |
| NFDHA | 20 ppt | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – |
| PFBA | 5 ppt | < 5 | < 5 | – |
| PFBS | 3 ppt | < 3 | < 3 | – |
| PFDA | 3 ppt | < 3 | < 3 | – |
| PFDoA | 3 ppt | < 3 | < 3 | – |
| PFEESA | 3 ppt | < 3 | < 3 | – |
| PFHpA | 3 ppt | < 3 | < 3 | – |
| PFHpS | 3 ppt | < 3 | < 3 | – |
| PFHxA | 3 ppt | < 3 | < 3 | – |
| PFHxS | 3 ppt | < 3 | < 3 | – |
| PFMBA | 3 ppt | < 3 | < 3 | – |
| PFMPA | 4 ppt | < 4 | < 4 | – |
| PFNA | 4 ppt | < 4 | < 4 | – |
| PFOA | 4 ppt | < 4 | < 4 | – |
| PFOS | 4 ppt | < 4 | < 4 | – |
| PFPeA | 3 ppt | < 3 | < 3 | – |
| PFPeS | 4 ppt | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | – |
| PFUnA | 2 ppt | < 2 | < 2 | – |
| lithium | 9 µg/L | 65.2 | – | 71.8 |
EPDS008 facility 17202 · sample point EPDS008 · MX
| Compound | MRL | 2024-04-22 SE1 | 2024-07-16 SE2 | 2024-10-14 SE3 | 2024-10-21 SE3 | 2025-01-08 SE4 |
|---|---|---|---|---|---|---|
| PFBS | 3 ppt | 8.1 | 7.7 | 9.8 | – | 3.2 |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | < 5 | – | < 5 |
| 4:2 FTS | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| 6:2 FTS | 5 ppt | < 5 | < 5 | < 5 | – | < 5 |
| 8:2 FTS | 5 ppt | < 5 | < 5 | < 5 | – | < 5 |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 | < 2 | – | < 2 |
| ADONA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| HFPO-DA | 5 ppt | < 5 | < 5 | < 5 | – | < 5 |
| NEtFOSAA | 5 ppt | < 5 | < 5 | < 5 | – | < 5 |
| NFDHA | 20 ppt | < 20 | < 20 | < 20 | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 | < 6 | – | < 6 |
| PFBA | 5 ppt | < 5 | < 5 | < 5 | – | < 5 |
| PFDA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFEESA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFHpA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFHpS | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFHxA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFHxS | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFMBA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFMPA | 4 ppt | < 4 | < 4 | < 4 | – | < 4 |
| PFNA | 4 ppt | < 4 | < 4 | < 4 | – | < 4 |
| PFOA | 4 ppt | < 4 | < 4 | < 4 | – | < 4 |
| PFOS | 4 ppt | < 4 | < 4 | < 4 | – | < 4 |
| PFPeA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFPeS | 4 ppt | < 4 | < 4 | < 4 | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 | < 8 | – | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 | < 7 | – | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 | < 2 | – | < 2 |
| lithium | 9 µg/L | 111 | 114 | – | 109 | 67.4 |
EPDS010 facility 21643 · sample point EPDS010 · groundwater
| Compound | MRL | 2024-04-17 SE1 | 2024-10-14 SE2 | 2024-10-21 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | 5.4 | 6.5 | – |
| PFBS | 3 ppt | 13.7 | 15.6 | – |
| PFHxA | 3 ppt | 11.2 | 12.9 | – |
| PFOA | 4 ppt | 6 | 7.1 | – |
| PFOS | 4 ppt | < 4 | 4.2 | – |
| PFPeA | 3 ppt | 14.3 | 17.2 | – |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | < 3 | < 3 | – |
| 6:2 FTS | 5 ppt | < 5 | < 5 | – |
| 8:2 FTS | 5 ppt | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 | – |
| ADONA | 3 ppt | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – |
| NFDHA | 20 ppt | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – |
| PFDA | 3 ppt | < 3 | < 3 | – |
| PFDoA | 3 ppt | < 3 | < 3 | – |
| PFEESA | 3 ppt | < 3 | < 3 | – |
| PFHpA | 3 ppt | < 3 | < 3 | – |
| PFHpS | 3 ppt | < 3 | < 3 | – |
| PFHxS | 3 ppt | < 3 | < 3 | – |
| PFMBA | 3 ppt | < 3 | < 3 | – |
| PFMPA | 4 ppt | < 4 | < 4 | – |
| PFNA | 4 ppt | < 4 | < 4 | – |
| PFPeS | 4 ppt | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | – |
| PFUnA | 2 ppt | < 2 | < 2 | – |
| lithium | 9 µg/L | 40.7 | – | 44.5 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| lithium | 14 | 100% | 114 2024-07-16 | 70.72–70.72 | 63.5 | 71.8 | 111 | 114 |
| PFBS | 14 | 86% | 15.6 2024-10-14 | 8.3–8.73 | 8.1 | 11 | 13.7 | 15.6 |
| PFHxA | 14 | 57% | 12.9 2024-10-14 | 4.71–6 | 5.8 | 7.8 | 11.2 | 12.9 |
| PFOA | 14 | 57% | 13.5 2024-10-14 | 4.31–6.03 | 4.2 | 7.1 | 10.9 | 13.5 |
| PFPeA | 14 | 57% | 17.2 2024-10-14 | 5.49–6.78 | 5.4 | 8.7 | 14.3 | 17.2 |
| PFOS | 14 | 50% | 11.7 2024-10-14 | 3.81–5.81 | <MRL | 6 | 10.6 | 11.7 |
| PFHxS | 14 | 29% | 9.4 2024-10-14 | 1.94–4.08 | <MRL | 3.3 | 8.4 | 9.4 |
| PFBA | 14 | 21% | 6.5 2024-10-14 | 1.22–5.15 | <MRL | <MRL | 5.4 | 6.5 |
| PFHpA | 14 | 14% | 3.7 2024-10-14 | 0.49–3.06 | <MRL | <MRL | 3.2 | 3.7 |
Never detected (21): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpS, PFMBA, PFMPA, PFNA, PFPeS, PFTA, PFTrDA, PFUnA.
Left-censored Kaplan–Meier statistics (Helsel 2005; Helsel & Lee 2006, NADA for R). Units: ppt; lithium µg/L. Each compound has one reporting limit, so the Kaplan–Meier mean equals the upper mean bound (non-detects at the MRL); the lower bound sets non-detects to 0. “<MRL” = the percentile falls below the reporting limit and cannot be estimated. These describe this system's UCMR 5 samples, not population estimates.
Sources
- EPA UCMR 5 occurrence data text files (UCMR5_All.txt; samples 2023-01-03 to 2026-06-02; data summary dated Jul 2026)
- EPA SDWIS via ECHO SDWA downloads, quarter 2026Q3
- EPA Public Water System Service Areas v3 (Mar 2026)
- US Census Bureau cartographic boundary counties 1:500k, 2024
- EPA/USGS NHDPlus V2 (medium resolution) flowlines, Strahler order 2+
Data build e94d59d510ac · 2026-10-18T04:09Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.