No open EPA violations as of 2026-10-15.
EPA record checked 2026-10-06
From EPA's record for CA1910070. PurityMap is independent of Los Angeles County Waterworks District 40 (Lancaster).
Every community water system publishes one each year.
Read the report ↗As listed in EPA's records. Your water bill names your supplier.
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32 results are on record. These 5 come first: results above a listed reference, then those closest to a legal limit.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 17.1 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 | 2023-09-11 to 2024-06-12 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Lead (90th percentile) | 1.8 µg/L | 15 µg/L federal action level | Below the listed reference | 2023–2025 monitoring period | Lead & Copper Rule 90th-percentile: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Water hardness | 5.6 gpg | Aesthetic, no federal health limit | Within a secondary/aesthetic reference | 2025 | Los Angeles County Waterworks Districts — Lancaster and Desert View Highlands (District 40, Regions 4 & 34) 2025 Consumer Confidence Report (CCR) |
| 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 | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| 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 | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| 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 | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| 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 | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| 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 | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| 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 | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-11 to 2024-06-18 | UCMR5 Analytical Results: LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER (CA1910070) |
0health-based violations in the last 10 years · none open as of 2026-10-15
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit. Meeting a federal limit is a compliance fact, not a health clearance.
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
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
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.
Tested your own tap? Read your results →
Local help
Call to be connected with a local plumbing provider about lead service lines, repiping or fixture replacement.
One email when a new sampling round is published or a result moves across its reference.
Follow this water →Its phone number on EPA record is 626-300-3300 and its mailing address is 900 SOUTH FREMONT AVENUE, ALHAMBRA, CA 91803. These details come from the system's EPA record.
PurityMap has no verified website for Los Angeles County Waterworks District 40 (Lancaster). Its mailing address on EPA record is 900 SOUTH FREMONT AVENUE, ALHAMBRA, CA 91803. Your water bill lists the ways to pay. PurityMap does not take payments.
EPA's records list Los Angeles County Waterworks District 40 (Lancaster) as serving Lancaster, California. Your water bill names your supplier.
PurityMap's record for Los Angeles County Waterworks District 40 (Lancaster) holds results for 29 PFAS substances. None was detected, and none is above a federal legal limit. Each result links to its source in the city report.
No open EPA violations as of 2026-10-15: that is what EPA's record shows for Los Angeles County Waterworks District 40 (Lancaster). The record comes from EPA's SDWIS compliance database.
Los Angeles County Waterworks District 40 (Lancaster) is on EPA record as drawing from surface water.
Start with the hot-or-cold tap check. Where Los Angeles County Waterworks District 40 (Lancaster) reported something related, it's shown below.
Lead at Los Angeles County Waterworks District 40 (Lancaster): 1.8 µg/L (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.