- PWSID
- CO0121900
- State
- Colorado
- System type
- community water system (CWS)
- Population served
- 27,640
- City
- Colorado Springs
- Counties
- El Paso County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2023-05-24 to 2024-02-20 · 9 entry point(s) · water types: GW;MX;SW
- Service-area boundary
- authoritative
PFOS ≥ 3 × its limit highest single result
PFOS 1–3 × its limit worst entry-point average
Open on the Colorado map · All Colorado 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
- Fountain City Of (CO0121275)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0 · detected: PFBA;PFHxA;PFPeA - Security Water District (CO0121775)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0 · detected: PFBA;PFHxA;PFPeA - Fountain Valley Authority (CO0121300)
Seller not monitored under UCMR 5.
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) | 10.5 | 10.25 | 4 |
| PFOS (ppt) | 15.8 | 11.85 | 4 |
| Hazard Index | 2.848 | 2.788 | 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).
Compared with Colorado standards
| Highest single result | Worst entry-point average* | Colorado | |
|---|---|---|---|
| PFOA (ppt) | 10.5 | 10.25 | 4 |
| PFOS (ppt) | 15.8 | 11.85 | 4 |
| PFNA (ppt) | 0 | 0 | 10 |
| PFHxS (ppt) | 28.4 | 27.8 | 10 |
| HFPO-DA (GenX) (ppt) | 0 | 0 | 10 |
Sum standards add the listed compounds within each sample (non-detects = 0). State compliance is normally judged on averages over time; these are screening comparisons.
Sampling history
Sampled 2023-05-24 to 2024-02-20 · 9 entry point(s) · water types: GW;MX;SW · 26 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-05-24 | Air Stripper #1 (GW) | SE1 | <4 | <4 | 0 | PFBA 23.7, lithium 27 µg/L |
| 2023-05-24 | Chlorinator & Aeration for Wells C1 & AN (GW) | SE1 | <4 | <4 | 0 | PFBA 32.3, PFHxA 119, PFPeA 96.3, lithium 28.5 µg/L |
| 2023-05-24 | Drinking Water Mitigation Facility (GW) | SE1 | <4 | <4 | 0 | PFBA 42, PFHxA 3.9, PFPeA 99.5, lithium 25.9 µg/L |
| 2023-05-24 | Fountain Water Connection (MX) | SE1 | <4 | <4 | 0 | lithium 13.5 µg/L |
| 2023-05-24 | Well JHW4 (GW) | SE1 | n/a | n/a | n/a | lithium 69.6 µg/L |
| 2023-05-25 | Chlorinator for JHW2R (GW) | SE1 | <4 | <4 | 1.925 | PFBA 5, lithium 75 µg/L |
| 2023-05-25 | Chlorinator for JHW5R Well (GW) | SE1 | 8.5 | 15.8 | 1.215 | PFHxA 4.2, PFPeA 4.3, lithium 63.7 µg/L |
| 2023-05-25 | Fountain Valley Connection (SW) | SE1 | <4 | <4 | 0 | lithium 14 µg/L |
| 2023-05-25 | Security Water Dept. Connection (MX) | SE1 | <4 | <4 | 0 | PFBA 31.2, PFPeA 48.3, lithium 27.4 µg/L |
| 2023-05-25 | Well JHW4 (GW) | SE1 | 10.5 | 7.9 | 2.728 | PFBA 10.7, PFHxA 5.4, PFPeA 5.4, PFPeS 5.3 |
| 2023-08-15 | Fountain Valley Connection (SW) | SE2 | <4 | <4 | 0 | none |
| 2023-08-15 | Fountain Water Connection (MX) | SE2 | <4 | <4 | 0 | none |
| 2023-08-15 | Security Water Dept. Connection (MX) | SE2 | <4 | <4 | 0 | PFBA 31.1, PFHxA 5, PFPeA 81.1, lithium 35.8 µg/L |
| 2023-11-08 | Air Stripper #1 (GW) | SE2 | <4 | <4 | 0 | PFBA 27.1, PFHxA 62.8, PFPeA 80.9, lithium 38.4 µg/L |
| 2023-11-08 | Chlorinator & Aeration for Wells C1 & AN (GW) | SE2 | <4 | <4 | 0 | PFBA 27.6, PFHxA 140.6, PFPeA 81, lithium 38.5 µg/L |
| 2023-11-08 | Chlorinator for JHW2R (GW) | SE2 | <4 | <4 | 1.585 | lithium 78.6 µg/L |
| 2023-11-08 | Chlorinator for JHW5R Well (GW) | SE2 | n/a | n/a | n/a | lithium 72.4 µg/L |
| 2023-11-08 | Drinking Water Mitigation Facility (GW) | SE2 | <4 | <4 | 0 | PFBA 37.7, PFHxA 21.6, PFPeA 108.9, lithium 41.1 µg/L |
| 2023-11-08 | Fountain Valley Connection (SW) | SE3 | <4 | <4 | 0 | lithium 11.9 µg/L |
| 2023-11-08 | Fountain Water Connection (MX) | SE3 | <4 | <4 | 0 | lithium 12.7 µg/L |
| 2023-11-08 | Security Water Dept. Connection (MX) | SE3 | <4 | <4 | 0 | PFBA 32.1, PFHxA 14.4, PFPeA 93.4, lithium 35.5 µg/L |
| 2023-11-08 | Well JHW4 (GW) | SE2 | 10 | 8 | 2.848 | PFBA 10.7, PFHxA 4.8, PFPeA 4.6, PFPeS 4.8, lithium 70.5 µg/L |
| 2024-01-09 | Chlorinator for JHW5R Well (GW) | SE2 | 7.4 | 7.9 | 1.397 | PFHxA 4.1, PFPeA 3.5 |
| 2024-02-20 | Fountain Valley Connection (SW) | SE4 | <4 | <4 | 0 | lithium 14.9 µg/L |
| 2024-02-20 | Fountain Water Connection (MX) | SE4 | <4 | <4 | 0 | PFPeA 5.1, lithium 15.9 µg/L |
| 2024-02-20 | Security Water Dept. Connection (MX) | SE4 | <4 | <4 | 0 | PFBA 27.7, PFHxA 14.7, PFPeA 91.5, lithium 34.1 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
720 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.
Air Stripper #1 facility 020 · sample point 020 · groundwater
| Compound | MRL | 2023-05-24 SE1 | 2023-11-08 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 23.7 | 27.1 |
| PFHxA | 3 ppt | < 3 | 62.8 |
| PFPeA | 3 ppt | < 3 | 80.9 |
| 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 |
| 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 |
| 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 |
| PFPeS | 4 ppt | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 27 | 38.4 |
Chlorinator & Aeration for Wells C1 & AN facility 00028 · sample point 028 · groundwater
| Compound | MRL | 2023-05-24 SE1 | 2023-11-08 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 32.3 | 27.6 |
| PFHxA | 3 ppt | 119 | 140.6 |
| PFPeA | 3 ppt | 96.3 | 81 |
| 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 |
| 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 |
| 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 |
| PFPeS | 4 ppt | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 28.5 | 38.5 |
Chlorinator for JHW2R facility 016T · sample point 016T · groundwater
| Compound | MRL | 2023-05-25 SE1 | 2023-11-08 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 5 | < 5 |
| PFBS | 3 ppt | 10.7 | 9.1 |
| PFHxS | 3 ppt | 19.2 | 15.8 |
| 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 |
| PFHxA | 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 | 75 | 78.6 |
Chlorinator for JHW5R Well facility 90013 · sample point 013T · groundwater
| Compound | MRL | 2023-05-25 SE1 | 2023-11-08 SE2 | 2024-01-09 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | 9.5 | – | 13 |
| PFHxA | 3 ppt | 4.2 | – | 4.1 |
| PFHxS | 3 ppt | 12.1 | – | 13.9 |
| PFOA | 4 ppt | 8.5 | – | 7.4 |
| PFOS | 4 ppt | 15.8 | – | 7.9 |
| PFPeA | 3 ppt | 4.3 | – | 3.5 |
| 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 | 63.7 | 72.4 | – |
Drinking Water Mitigation Facility facility 038 · sample point 038 · groundwater
| Compound | MRL | 2023-05-24 SE1 | 2023-11-08 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 42 | 37.7 |
| PFHxA | 3 ppt | 3.9 | 21.6 |
| PFPeA | 3 ppt | 99.5 | 108.9 |
| 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 |
| 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 |
| 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 |
| PFPeS | 4 ppt | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 25.9 | 41.1 |
Fountain Valley Connection facility 00018 · sample point 018 · surface water
| Compound | MRL | 2023-05-25 SE1 | 2023-08-15 SE2 | 2023-11-08 SE3 | 2024-02-20 SE4 |
|---|---|---|---|---|---|
| 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 |
| PFBS | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| 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 | 14 | < 9 | 11.9 | 14.9 |
Fountain Water Connection facility 036 · sample point 036 · MX
| Compound | MRL | 2023-05-24 SE1 | 2023-08-15 SE2 | 2023-11-08 SE3 | 2024-02-20 SE4 |
|---|---|---|---|---|---|
| PFPeA | 3 ppt | < 3 | < 3 | < 3 | 5.1 |
| 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 |
| PFBS | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| 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 |
| 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 | 13.5 | < 9 | 12.7 | 15.9 |
Security Water Dept. Connection facility 035 · sample point 035 · MX
| Compound | MRL | 2023-05-25 SE1 | 2023-08-15 SE2 | 2023-11-08 SE3 | 2024-02-20 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 31.2 | 31.1 | 32.1 | 27.7 |
| PFHxA | 3 ppt | < 3 | 5 | 14.4 | 14.7 |
| PFPeA | 3 ppt | 48.3 | 81.1 | 93.4 | 91.5 |
| 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 |
| PFBS | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| 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 |
| 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 |
| 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 | 27.4 | 35.8 | 35.5 | 34.1 |
Well JHW4 facility 00017 · sample point 017T · groundwater
| Compound | MRL | 2023-05-24 SE1 | 2023-05-25 SE1 | 2023-11-08 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | – | 10.7 | 10.7 |
| PFBS | 3 ppt | – | 15.1 | 16.7 |
| PFHxA | 3 ppt | – | 5.4 | 4.8 |
| PFHxS | 3 ppt | – | 27.2 | 28.4 |
| PFOA | 4 ppt | – | 10.5 | 10 |
| PFOS | 4 ppt | – | 7.9 | 8 |
| PFPeA | 3 ppt | – | 5.4 | 4.6 |
| PFPeS | 4 ppt | – | 5.3 | 4.8 |
| 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 |
| PFTA | 8 ppt | – | < 8 | < 8 |
| PFTrDA | 7 ppt | – | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 | < 2 |
| lithium | 9 µg/L | 69.6 | – | 70.5 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| lithium | 24 | 92% | 78.6 2023-11-08 | 35.2–35.95 | 28.5 | 41.1 | 72.4 | 75 |
| PFPeA | 24 | 58% | 108.9 2023-11-08 | 33.49–34.74 | 4.3 | 81 | 96.3 | 99.5 |
| PFBA | 24 | 54% | 42 2023-05-24 | 14.12–16.41 | 5 | 27.7 | 32.3 | 37.7 |
| PFHxA | 24 | 50% | 140.6 2023-11-08 | 16.69–18.19 | <MRL | 5.4 | 62.8 | 119 |
| PFBS | 24 | 25% | 16.7 2023-11-08 | 3.09–5.34 | <MRL | <MRL | 13 | 15.1 |
| PFHxS | 24 | 25% | 28.4 2023-11-08 | 4.86–7.11 | <MRL | <MRL | 19.2 | 27.2 |
| PFOA | 24 | 17% | 10.5 2023-05-25 | 1.52–4.85 | <MRL | <MRL | 8.5 | 10 |
| PFOS | 24 | 17% | 15.8 2023-05-25 | 1.65–4.98 | <MRL | <MRL | 7.9 | 8 |
| PFPeS | 24 | 8% | 5.3 2023-05-25 | 0.42–4.09 | <MRL | <MRL | <MRL | 4.8 |
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, PFHpA, PFHpS, PFMBA, PFMPA, PFNA, 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 2026-05-07; 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 e835c17dd18b · 2026-10-18T04:06Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.