Community Water System · PWS CA1910067
Los Angeles-City, Dept. of Water & Power
Operator location Los Angeles, California - 42% of 33 violations are health-based (upper-third health share (> 23%)); surface water source; 3,875,566 served per SDWIS.
- 3,875,566
- People served (this PWS) Larger third of systems
- 33
- EPA violations (this PWS) Middle third of systems
- 14
- Health-based (this PWS) Upper third by health-based share
- No PFAS
- UCMR5 (this PWS) Tested, none detected
Los Angeles-City, Dept. of Water & Power standing, mid SDWIS violation third
42% of 33 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 42% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #2 of 29,740 among systems serving 500+.
The verdict
Los Angeles-City, Dept. of Water & Power lands in the middle third by violation volume (33), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (3,875,566; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 42% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #2 of 29,740
- Population · /systems
- #1 of 1,701
- Population · CA
- 33
- Total EPA violations on record
- 42%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 709,623
- County
- Los Angeles
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 2
- Treatment Tech Violations
- 12
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 8 | 1993 |
| Groundwater Rule | Other | 2 | 2016 |
| Groundwater Rule | TT | 2 | 2016 |
| Interim Enhanced Surface Water Treatment Rule | MR | 2 | 2016 |
| Coliform (TCR) | MCL | 2 | 2014 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 2 | 2018 |
Violation Count vs. the National Corpus
Los Angeles-City, Dept. of Water & Power has 33 recorded EPA violations, 45% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 54% carry more. 42% of this system's own violations are health-based (14 of 33), and it ranks #2 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
33 Lower than most fewer violations than 54% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
How many violations vs. how serious, among peer systems
Los Angeles-City, Dept. of Water & Power plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 464 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NMeFOSAA | 9/4/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFHpA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 9/4/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFMBA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/4/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHxS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFEESA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 9/4/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| ADONA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 9/4/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 9/4/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMPA | 9/4/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/4/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 9/4/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 9/4/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/4/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 9/4/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 9/4/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| 8:2 FTS | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 9/4/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/4/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFDA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 9/4/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFHpS | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 9/4/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 9/4/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/4/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Los Angeles-City, Dept. of Water & Power
14 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA1910067.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
33 violations · 3,875,566 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Los Angeles-City, Dept. of Water & Power
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in California compares on the same EPA violation measures. California systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.