No open EPA violations as of 2026-10-15.
EPA record checked 2026-10-06
From EPA's record for CA3010064. PurityMap is independent of City of Westminster.
Every community water system publishes one each year. Your water bill or the utility's website links to it.
As listed in EPA's records. Your water bill names your supplier.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.
Are you this utility? Correct this listing →
31 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 | 36.64 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 | 2023-03-14 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorooctanesulfonic acid (PFOS) | 5.3 ng/L | 4.0 ng/L federal MCL (2024) | Above EPA's 2024 limit (one sample) | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorohexanesulfonic acid (PFHxS) | 5 ng/L | 10 ng/L federal MCL (2024) | At or below EPA's 2024 limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Lead (90th percentile) | 4.7 µg/L | 15 µg/L federal action level | Below the listed reference | 2022–2024 monitoring period | Lead & Copper Rule 90th-percentile: CITY OF WESTMINSTER (CA3010064) |
| 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 | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| 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 | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| 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 | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| 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 | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| 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 | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| 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 | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-29 to 2025-09-16 | UCMR5 Analytical Results: CITY OF WESTMINSTER (CA3010064) |
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.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
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 →
★ Best choice: Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200), certified for PFOS and lead.
| Pick | Product | Certification | Price | Link |
|---|---|---|---|---|
| ★ Best choice | Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200) | Certified for PFOS (NSF/ANSI 53, WQA) | $$ | Check price on Amazon |
| Also good | Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M) | Certified for PFOS (NSF/ANSI 53, WQA) | $$ | Check price at Aquasana |
| Also good | Aquasana Clean Water Machine Countertop Filter (AQ-CWM2) | Certified for PFOS (NSF/ANSI 53, WQA) | $$ | Check price at Aquasana |
| Pick | Product | Certification | Price | Link |
|---|---|---|---|---|
| Also good | SmartFlow® Reverse Osmosis | Certified for PFOS (NSF/ANSI 53 (includes P473), WQA) | $$$ | Check price at Aquasana |
| Also good | Waterdrop G3P600 Tankless Reverse-Osmosis System | Certified for PFOS (NSF/ANSI 53, IAPMO) | $$$ | Check price at Waterdrop |
| Also good | Waterdrop G3P800 Tankless Reverse-Osmosis System | Certified for PFOS (NSF/ANSI 53, IAPMO) | $$$ | Check price at Waterdrop |
| Also good | AquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100) | Certified for PFOS (NSF/ANSI 53, IAPMO) | $$$ | Check price on Amazon |
| Also good | AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000) | Certified for PFOS (NSF/ANSI 53, IAPMO) | $$$ | Check price on Amazon |
| Also good | Patriot Pure Ultimate Water Filtration System | Certified for PFOS (NSF/ANSI 53, NSF, IAPMO) | $$ | Check price on Amazon |
| Also good | iSpring RCC7AK Alkaline Reverse Osmosis SystemUse code REFISPRING at checkout: 10% off your first iSpring order. | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | $$ | Check price at iSpring |
| Also good | iSpring RO5004F Tankless Reverse Osmosis System with UVUse code REFISPRING at checkout: 10% off your first iSpring order. | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | $$$ | Check price at iSpring |
| Also good | Waterdrop X12 Reverse Osmosis System | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | $$$$ | Check price at Waterdrop |
★ Best choice: HealthShield™, certified for PFOS and PFHxS.
| Pick | Product | Certification | Price | Link |
|---|---|---|---|---|
| ★ Best choice | HealthShield™ | Certified for PFOS and PFHxS (NSF/ANSI 53, WQA) | $$$$ | Check price at Aquasana |
| $ Budget pick | iSpring WGB32B-PFKS PFAS & Heavy Metals Whole House FilterUse code REFISPRING at checkout: 10% off your first iSpring order. | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | $$$ | Check price at iSpring |
Also: lead picks →
Certified filters for lithium →
PurityMap earns a commission from these links. "Best choice" and "Budget pick" go to certified products first; commission never decides them. As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
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 official website is westminster-ca.gov, its phone number on EPA record is 714-548-3693 and its mailing address is 14381 Olive St, WESTMINSTER, CA 92683. These details come from the system's EPA record and a check of its website.
Bills, starting service and stopping service are handled by City of Westminster on its official website, westminster-ca.gov. PurityMap does not take payments.
EPA's records list City of Westminster as serving Westminster, California. Your water bill names your supplier.
PurityMap's record for City of Westminster holds results for 29 PFAS substances. 2 were 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 City of Westminster. The record comes from EPA's SDWIS compliance database.
City of Westminster is on EPA record as drawing from surface water.
Start with the hot-or-cold tap check. Where City of Westminster reported something related, it's shown below.
Lead at City of Westminster: 4.7 µg/L (90th percentile, 2022–2024 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.