Short answer: No measured result is above a legal limit; lithium sits above a screening level, and the water is very hard. Moulton Niguel Water District serves 168,315 residents.
Your water bill or annual water quality report names your actual supplier.
Also supplies: Aliso Viejo, Laguna Hills
MOULTON NIGUEL WATER DISTRICT (EPA PWSID CA3010073) delivers surface water to 168,315 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. The utility's 2025 CCR reports very hard water.
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.
Test your hardness before buying a softener.
Lithium 43 µg/L, above the 10.0 µg/L EPA health reference level
15.45 gpg (very hard)
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
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 →
Each card names which Laguna Niguel findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Laguna Niguel, no regulated PFAS were detected in EPA's 2024 testing. MOULTON NIGUEL WATER DISTRICT (PWSID CA3010073) 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.
MOULTON NIGUEL WATER DISTRICT (PWS ID CA3010073) is the public water system on record for Laguna Niguel, California, serving about 168,315 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 (2023-04-11 to 2024-01-10) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
Lead is not in Laguna Niguel'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 Laguna Niguel holds 32 findings: 2 above a reference and 30 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
Laguna Niguel's water is recorded as 15.45 gpg, very hard. Hardness is an aesthetic and plumbing characteristic, not a health-based limit.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 43 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Water hardness | 15.45 gpg | Aesthetic, no federal health limit | Above a secondary/aesthetic reference | 2025 | Moulton Niguel Water District 2025 Consumer Confidence Report (CCR) |
| 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 | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| 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 | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| 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 | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| 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 | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| 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 | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2022–2024 monitoring period | Lead & Copper Rule 90th-percentile: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| 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 | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-11 to 2024-01-10 | UCMR5 Analytical Results: MOULTON NIGUEL WATER DISTRICT (CA3010073) |
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: MOULTON NIGUEL WATER DISTRICT (CA3010073)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: MOULTON NIGUEL WATER DISTRICT (CA3010073)
US EPA SDWIS
Consumer Confidence Report (CCR)
Moulton Niguel Water District 2025 Consumer Confidence Report (CCR)
Moulton Niguel Water District
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 Moulton Niguel Water District reported something related, it's shown below.
Lead at Moulton Niguel Water District: not detected (90th percentile, 2022–2024 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.