Los Angeles CWWD 40 Reg 4 & 34 Lancaster
Drinking water quality, contact, and Consumer Confidence Report
Serving 5 cities in CA · PWSID CA1910070
Los Angeles CWWD 40 Reg 4 & 34 Lancaster serves 203,686 people. 2 contaminants currently exceed health-based guidelines — full breakdown below.
- People served
- 203,686
- Last EPA sample
- 2025-09-30
- PFAS
- Not detected above guidelines
- Health-based violations since 2020
- 0
Data sources: EPA SDWIS, Los Angeles CWWD 40 Reg 4 & 34 Lancaster's published Consumer Confidence Report, and compliance monitoring reported to EPA by CA State Water Resources Control Board, Div. of Drinking Water.
This page summarizes publicly available EPA and CCR records. For health decisions about your water, consult your utility or a licensed professional.
Official Los Angeles CWWD 40 Reg 4 & 34 Lancaster Resources
Los Angeles CWWD 40 Reg 4 & 34 Lancaster Service Area
Loading map...
This map shows the approximate service area for Los Angeles CWWD 40 Reg 4 & 34 Lancaster. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
Los Angeles CWWD 40 Reg 4 & 34 Lancaster Water Quality Grade
Not graded: Monitor
Los Angeles CWWD 40 Reg 4 & 34 Lancaster reads Monitor. A letter grade is given only beside a Safe verdict.
Is Los Angeles CWWD 40 Reg 4 & 34 Lancaster Water Safe to Drink?
Los Angeles CWWD 40 Reg 4 & 34 Lancaster has reported 2 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.
Partial data: State Water Board lab results show 19 of the 42 active sources Los Angeles CWWD 40 Reg 4 & 34 Lancaster sampled above California's hexavalent chromium limit of 10 µg/L (state MCL, in effect since October 1, 2024). The highest average is 17 µg/L at WELL 04-62 (6 samples since October 1, 2024, latest June 16, 2026). Los Angeles CWWD 40 Reg 4 & 34 Lancaster's treated or delivered water was not sampled, and its other sources average within it, so these results do not show the water it serves above the limit, and they are not counted toward its verdict. Source: State Water Resources Control Board lab results (updated 2026-09-15).
This utility serves 203,686 people across 5 cities in CA. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
Get your water independently tested in California →How does California water quality rank nationally? →
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in California
Los Angeles CWWD 40 Reg 4 & 34 Lancaster Service Area
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
Free forever. Unsubscribe anytime. We never share your email.
Los Angeles CWWD 40 Reg 4 & 34 Lancaster Contact & Information
Phone
Mailing Address
B2B Contact Data
B2B Contact Data Available
Contacts for Los Angeles CWWD 40 Reg 4 & 34 Lancaster
| Name | Title | Phone | |
|---|---|---|---|
| J████ S████ | Water Treatment Supervisor | (555) ███-████ | j████@city████.gov |
| M████ J██████ | Utility Director | (555) ███-████ | m████@water████.org |
Water Sources & Treatment
Water Sources
Treatment Methods
Disinfectant Used
chlorine
Los Angeles CWWD 40 Reg 4 & 34 Lancaster Consumer Confidence Report
A Consumer Confidence Report (CCR) is the EPA-mandated annual water-quality report every community water system must publish by July 1 each year (Safe Drinking Water Act §1414(c)(4)). It summarizes contaminants tested, MCL and MCLG comparisons, and any system violations from the prior calendar year.
A current CCR for Los Angeles CWWD 40 Reg 4 & 34 Lancaster has not been published or validated on TapWaterData yet.
Residents: contact the utility directly using the phone number above, or check the EPA’s national CCR portal. Reports are typically distributed by mail or posted on the utility’s official website.
Los Angeles CWWD 40 Reg 4 & 34 Lancaster Annual Water Quality Reports
Historical reports are being compiled. Check back soon for archived water quality data.
What is a CCR? The Consumer Confidence Report (CCR) is an annual water quality report that water utilities are required by the EPA to provide to customers. It contains information about your water source, detected contaminants, and compliance status.
EPA Health-Based Violations Since 2020
Los Angeles CWWD 40 Reg 4 & 34 Lancaster has no health-based EPA violation since 2020 (EPA data as of Q2 2026).
EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Concerned about what's in your water?
You're viewing 2 contaminants above health-based guidelines here. Your own tap water can differ — upload your test (PDF or a photo) and we'll email a full plain-English reading of every number, free.
Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.
Upload my testRecommended Water Filters for Los Angeles CWWD 40 Reg 4 & 34 Lancaster
Based on water quality data from cities served by Los Angeles CWWD 40 Reg 4 & 34 Lancaster, we recommend NSF-certified filters that can remove contaminants above health guidelines.
Frequently Asked Questions about Los Angeles CWWD 40 Reg 4 & 34 Lancaster
Is Los Angeles CWWD 40 Reg 4 & 34 Lancaster water safe to drink?
Does Los Angeles CWWD 40 Reg 4 & 34 Lancaster have PFAS in its water?
How do I pay my Los Angeles CWWD 40 Reg 4 & 34 Lancaster water bill?
How many people does Los Angeles CWWD 40 Reg 4 & 34 Lancaster serve?
What cities does Los Angeles CWWD 40 Reg 4 & 34 Lancaster serve?
Does Los Angeles CWWD 40 Reg 4 & 34 Lancaster have any EPA violations?
What is Los Angeles CWWD 40 Reg 4 & 34 Lancaster's phone number?
Where can I find Los Angeles CWWD 40 Reg 4 & 34 Lancaster's Consumer Confidence Report?
Similar water utilities in California
How we built this page
Water-quality and contact data on this page comes from public federal and state records. We update each utility's record whenever its underlying source publishes new data — typically within days of an EPA SDWIS refresh.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: Los Angeles CWWD 40 Reg 4 & 34 Lancaster's most recent published Consumer Confidence Report (CCR), where available.
- Service area & contact: EPA SDWIS. The compliance records it holds for this system are reported to EPA by CA State Water Resources Control Board, Div. of Drinking Water, the state's drinking-water primacy agency.
Spotted a data issue? Use the Spotted something off? link at the bottom of the page — corrections feed back into the next data refresh. Learn more about TapWaterData.
Are you Los Angeles CWWD 40 Reg 4 & 34 Lancaster? Publish your 2027 CCR
TapWaterData runs a free CCR publishing service for community water systems. Claim this listing to publish your Consumer Confidence Report here — it inherits this page's search authority and reaches every customer who Googles Los Angeles CWWD 40 Reg 4 & 34 Lancaster.
- EPA-compliant distribution. Satisfies the 2027 Revised CCR Rule direct-URL requirement with an auditable archive.
- Publish once a year. Agent-assisted workflow; no login setup for small systems.
- Inherits this page's reach. Your published CCR appears directly on the page customers already find on Google.
Free for operators. No card required. Typical setup: 5 minutes.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach Los Angeles CWWD 40 Reg 4 & 34 Lancaster. For a problem with your water now (discolored water, no water, low pressure, a leak), contact Los Angeles CWWD 40 Reg 4 & 34 Lancaster directly.
Check another location
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
One email a week. Unsubscribe anytime.