Los Angeles-city, Department of Water & Power
EPA ID: CA1910067 · 3,875,566 people served · 175 ZIP codes
Tallying the federal enforcement file for Los Angeles-city, Department of Water & Power yields 18 open violations that have not been formally closed — each finding sits in the EPA database while the utility continues to deliver water to approximately 3,875,566 residents and works through the required corrective action process.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 4 (2021) to 39 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Los Angeles-city, Department of Water & Power Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Los Angeles-city, Department of Water & Power serves a community with a median household income of $88,958 and an estimated 4,656,990 residents across its service area. Approximately 79% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 49% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
Los Angeles-city, Department of Water & Power's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 2% of homes in Los Angeles County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How Los Angeles-city, Department of Water & Power compares to EPA limits
What This Means For You
Combined Radium at 17 pCi/L exceeds the EPA maximum of 5 pCi/L.
Barium at 5 mg/L exceeds the EPA maximum of 2 mg/L.
Contaminant 3000 at 2 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 83 detections recorded. 17 exceed federal EPA limits (4 ppt for PFOA/PFOS). 13 exceed state limits.
Comparable Water Systems
Similar-sized systems in California
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Los Angeles-city, Department of Water & Power (EPA ID: CA1910067) is a community water system in California that serves approximately 3,875,566 people from surface water sources.
This system provides water to 175 ZIP codes across 53 communities.
Average Home Safety Score: C (68/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| April 1, 2025 | Barium | Health-based | Unresolved |
| January 1, 2025 | Combined Radium | Health-based | Unresolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unresolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Unresolved |
| October 1, 2024 | Combined Radium | Health-based | Unresolved |
| July 1, 2024 | Combined Radium | Health-based | Unresolved |
| April 1, 2024 | Barium | Health-based | Unresolved |
| April 1, 2024 | Combined Radium | Health-based | Unresolved |
| January 1, 2024 | Barium | Health-based | Unresolved |
| January 1, 2024 | Combined Radium | Health-based | Unresolved |
| October 1, 2023 | Combined Radium | Health-based | Unresolved |
| July 1, 2023 | Contaminant 3000 | Monitoring | Resolved |
| July 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| July 1, 2023 | Combined Radium | Health-based | Unresolved |
| April 1, 2023 | Combined Radium | Health-based | Unresolved |
| January 1, 2023 | Combined Radium | Health-based | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Combined Radium | Radionuclides | 17 | Yes |
| Barium | Inorganic | 5 | Yes |
| Contaminant 3000 | Other Violation | 2 | Yes |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Consumer Confidence Report Rule | Reporting Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 91316 | 0.015 mg/L | No | N/A |
| 91436 | 0.015 mg/L | No | N/A |
| 90275 | 0.005 mg/L | No | N/A |
| 90001 | 0.0039 mg/L | No | N/A |
| 90002 | 0.0039 mg/L | No | N/A |
| 90003 | 0.0039 mg/L | No | N/A |
| 90004 | 0.0039 mg/L | No | N/A |
| 90005 | 0.0039 mg/L | No | N/A |
| 90006 | 0.0039 mg/L | No | N/A |
| 90007 | 0.0039 mg/L | No | N/A |
| 90008 | 0.0039 mg/L | No | N/A |
| 90009 | 0.0039 mg/L | No | N/A |
| 90010 | 0.0039 mg/L | No | N/A |
| 90011 | 0.0039 mg/L | No | N/A |
| 90012 | 0.0039 mg/L | No | N/A |
| 90013 | 0.0039 mg/L | No | N/A |
| 90014 | 0.0039 mg/L | No | N/A |
| 90015 | 0.0039 mg/L | No | N/A |
| 90016 | 0.0039 mg/L | No | N/A |
| 90017 | 0.0039 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 133 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 42 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
This system serves 175 ZIP codes:
90001 · 90002 · 90003 · 90004 · 90005 90006 · 90007 · 90008 · 90009 · 90010 90011 · 90012 · 90013 · 90014 · 90015 90016 · 90017 · 90018 · 90019 · 90020 90021 · 90022 · 90023 · 90024 · 90025 90026 · 90027 · 90028 · 90029 · 90030 90031 · 90032 · 90033 · 90034 · 90035 90036 · 90037 · 90038 · 90039 · 90040 90041 · 90042 · 90043 · 90044 · 90045 90046 · 90047 · 90048 · 90049 · 90050 90051 · 90052 · 90053 · 90054 · 90055 90056 · 90057 · 90058 · 90059 · 90060 90061 · 90062 · 90063 · 90064 · 90065 90066 · 90067 · 90068 · 90069 · 90070 90071 · 90072 · 90073 · 90074 · 90075 90076 · 90077 · 90078 · 90079 · 90080 90081 · 90082 · 90083 · 90084 · 90086 90087 · 90088 · 90089 · 90090 · 90091 90093 · 90094 · 90095 · 90096 · 90099 90101 · 90103 · 90189 · 90210 · 90211 90212 · 90230 · 90231 · 90232 · 90233 90247 · 90248 · 90272 · 90275 · 90291 90292 · 90293 · 90295 · 90296 · 90302 90305 · 90402 · 90501 · 90502 · 90710 90717 · 90731 · 90732 · 90733 · 90734 90744 · 90748 · 90749 · 91030 · 91040 91042 · 91214 · 91302 · 91303 · 91304 91306 · 91307 · 91311 · 91316 · 91321 91324 · 91325 · 91326 · 91330 · 91331 91335 · 91340 · 91342 · 91343 · 91344 91345 · 91352 · 91356 · 91364 · 91367 91371 · 91401 · 91402 · 91403 · 91405 91406 · 91411 · 91423 · 91436 · 91504 91505 · 91601 · 91602 · 91604 · 91605 91606 · 91607 · 91608 · 91610 · 91759
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Los Angeles-city, Department of Water & Power (CA1910067) on EPA.gov.
Frequently Asked Questions
Is Los Angeles-city, Department of Water & Power water safe to drink?
Los Angeles-city, Department of Water & Power has recorded 18 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Los Angeles-city, Department of Water & Power serve?
Los Angeles-city, Department of Water & Power serves approximately 3,875,566 people across 175 ZIP codes in California.
Where does Los Angeles-city, Department of Water & Power get its water?
The primary water source is surface water.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from Los Angeles Department of Water and Power Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: Los Angeles Department of Water and Power Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment chemicals and what each one does
Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.
Treatment classification and chemical list sourced from Los Angeles Department of Water and Power Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Los Angeles-city, Department of Water & Power (EPA ID: CA1910067) — request the latest Consumer Confidence Report or ask about specific contaminants.