Perfluorooctanoic acid
4.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: PFOA is above its federal limit (a 2024 limit that water systems have until at least 2029 to meet); a past health-based violation (Nitrate) is on record. Yucaipa Valley Water District serves 52,202 residents.
Your water bill or annual water quality report names your actual supplier.
Also supplies: Calimesa
The bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.
4.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
YUCAIPA VALLEY WATER DISTRICT (EPA PWSID CA3610055) delivers surface water to 52,202 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.
4health-based violations in the last 10 years
From EPA SDWIS. Counted once per contaminant per year, as in the Track record score. All 5 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.
PFOA 4.2 ng/L, above the 4 ng/L limit (+3 more PFAS detected)
Each card names which Yucaipa findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Yucaipa, PFOA 4.2 ng/L was measured above the 4 ng/L federal limit in EPA's 2024 testing; one health-based violation is on record (Nitrate). YUCAIPA VALLEY WATER DISTRICT (PWSID CA3610055) has a Purity Score of 70/100 (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.
YUCAIPA VALLEY WATER DISTRICT (PWS ID CA3610055) is the public water system on record for Yucaipa, California, serving about 52,202 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2023-10-10 to 2024-07-09), PFOA was measured at 4.2 ng/L against a 4 ng/L federal limit. PFBS (10 ng/L, below the 2,000 ng/L EPA health advisory) and PFHxA (7.1 ng/L, below the 400,000 ng/L state limit) were also detected. PFPeA (8.9 ng/L) was also detected; it has no federal or state limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
Lead is not in Yucaipa'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 YUCAIPA VALLEY WATER DISTRICT within about the last ten years: Nitrate (2023). The findings above show each one's status.
PurityMap's current record for Yucaipa holds 32 findings: 2 above a reference, 2 detected within the reference, 1 detected with no limit and 27 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 |
|---|---|---|---|---|---|
| Nitrate | 12 MG/L | 10 mg/L | Above the listed reference | 2023 | EPA SDWIS Violations & Enforcement: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorooctanoic acid (PFOA) | 4.2 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorobutanesulfonic acid (PFBS) | 10 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorohexanoic acid (PFHxA) | 7.1 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoropentanoic acid (PFPeA) | 8.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 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: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: YUCAIPA VALLEY WATER DISTRICT (CA3610055) |
Perfluorobutanesulfonic acid (PFBS)
Perfluorohexanoic acid (PFHxA)
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)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
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: YUCAIPA VALLEY WATER DISTRICT (CA3610055)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: YUCAIPA VALLEY WATER DISTRICT (CA3610055)
US EPA SDWIS
State SDWIS Compliance Record
EPA SDWIS Violations & Enforcement: YUCAIPA VALLEY WATER DISTRICT (CA3610055)
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 Yucaipa Valley Water District reported something related, it's shown below.
Lead at Yucaipa Valley Water District: 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.