Perfluorooctanesulfonic acid
24ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: Two PFAS, PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); everything else measured is within its reference or not detected. Tract 180 Mutual Water Co. serves 14,000 residents.
Your water bill or annual water quality report names your actual supplier.
Each 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.
24ng/L
Each block = 4.0 ng/L federal MCL (2024)
6.5ng/L
Each block = 4.0 ng/L federal MCL (2024)
TRACT 180 MUTUAL WATER CO. (EPA PWSID CA1910159) delivers groundwater to 14,000 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.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
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.
A tap test can confirm levels at your home before you choose treatment.
PFOS 24 ng/L, above the 4 ng/L limit (+3 more PFAS detected)
Each card names which Cudahy 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 Cudahy, PFOS 24 ng/L and PFOA 6.5 ng/L were measured above the 4 ng/L federal limit in EPA's 2024 testing. TRACT 180 MUTUAL WATER CO. (PWSID CA1910159) has a Purity Score of 57/100 (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.
TRACT 180 MUTUAL WATER CO. (PWS ID CA1910159) is the public water system on record for Cudahy, California, serving about 14,000 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 (2024-03-27 to 2024-09-20), PFOS was measured at 24 ng/L against a 4 ng/L federal limit and PFOA was measured at 6.5 ng/L against a 4 ng/L federal limit. PFHxA (3.1 ng/L, below the 400,000 ng/L state limit) and PFHxS (5.9 ng/L, below the 10 ng/L federal limit) were also detected. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
Lead is not in Cudahy'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.
PurityMap's current record for Cudahy holds 31 findings: 2 above a reference, 2 detected within the reference 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 |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 24 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorooctanoic acid (PFOA) | 6.5 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorohexanesulfonic acid (PFHxS) | 5.9 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorohexanoic acid (PFHxA) | 3.1 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 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 | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 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 | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 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 | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 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 | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 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 | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2023–2025 monitoring period | Lead & Copper Rule 90th-percentile: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 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 | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| 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 | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-27 to 2024-09-20 | UCMR5 Analytical Results: TRACT 180 MUTUAL WATER CO. (CA1910159) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
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)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
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: TRACT 180 MUTUAL WATER CO. (CA1910159)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: TRACT 180 MUTUAL WATER CO. (CA1910159)
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 Tract 180 Mutual Water Co. reported something related, it's shown below.
Lead at Tract 180 Mutual Water Co.: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.