Short answer: No measured result is above a legal limit. North Coast County Water Dist serves 38,546 residents.
Your water bill or annual water quality report names your actual supplier.
NORTH COAST COUNTY WATER DIST (EPA PWSID CA4110025) delivers surface water to 38,546 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.
The records describe the system. A certified lab test shows what reaches your glass.
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 →
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Pacifica, no regulated PFAS were detected in EPA's 2024 testing. NORTH COAST COUNTY WATER DIST (PWSID CA4110025) has a Purity Score of 100/100 (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.
NORTH COAST COUNTY WATER DIST (PWS ID CA4110025) is the public water system on record for Pacifica, California, serving about 38,546 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
None of the 29 PFAS in EPA's UCMR 5 testing (2024-05-09 to 2025-02-06) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
Lead is not in Pacifica'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 Pacifica holds 31 findings: 31 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 |
|---|---|---|---|---|---|
| 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 | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 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 | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 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 | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 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 | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 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 | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 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: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 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 | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| 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 | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-09 to 2025-02-06 | UCMR5 Analytical Results: NORTH COAST COUNTY WATER DIST (CA4110025) |
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)
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: NORTH COAST COUNTY WATER DIST (CA4110025)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: NORTH COAST COUNTY WATER DIST (CA4110025)
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 North Coast County Water Dist reported something related, it's shown below.
Lead at North Coast County Water Dist: not detected (90th percentile, 2023–2025 monitoring period). 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.