Community Water System · PWS CA1910042
Pico Rivera - City, Water Dept.
Operator location Pico Rivera, California - 24% of 17 violations are health-based (upper-third health share (> 23%)); groundwater source; 40,600 served per SDWIS.
- 40,600
- People served (this PWS)
- 17
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- 9 PFAS
- UCMR5 (this PWS)
Pico Rivera - City, Water Dept. standing, low SDWIS violation third
24% of 17 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 24% is upper-third health share (> 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #1,357 of 29,740 among systems serving 500+.
The verdict
Pico Rivera - City, Water Dept. is in the lower third by violation count (17; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is large (40,600; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 24% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 9 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #1,357 of 29,740
- Population · /systems
- #229 of 1,701
- Population · CA
- 17
- Total EPA violations on record
- 24%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
9 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 9,474
- County
- Los Angeles
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 10
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 4 | 1994 |
| Lead and Copper Rule | MR | 2 | 1999 |
| Chlorine | MR | 2 | 2021 |
| Coliform (TCR) | MR | 2 | 2003 |
| Revised Total Coliform Rule | MON | 2 | 2022 |
| E. COLI | MR | 2 | 2021 |
Violation Count vs. the National Corpus
Pico Rivera - City, Water Dept. has 17 recorded EPA violations, 28% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 71% carry more. 24% of this system's own violations are health-based (4 of 17), and it ranks #1,357 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)
17 Lower than most fewer violations than 71% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 89 of 435 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHpA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 8/28/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/28/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 8/28/2024 | 7.60 ppt | 4.00 ppt | Detected |
| PFOS | 8/28/2024 | 29.00 ppt | 4.00 ppt | Detected |
| PFHxS | 8/28/2024 | 3.30 ppt | 3.00 ppt | Detected |
| PFBS | 8/28/2024 | 8.80 ppt | 3.00 ppt | Detected |
| ADONA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 8/28/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFNA | 8/28/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 8/28/2024 | 12.00 ppt | 5.00 ppt | Detected |
| HFPO-DA | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 8/28/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFPeS | 8/28/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 8/28/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 8/28/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 8/28/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 8/28/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFHxA | 8/28/2024 | 11.00 ppt | 3.00 ppt | Detected |
| PFDoA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 8/28/2024 | 9.80 ppt | 4.00 ppt | Detected |
| PFHxS | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 8/28/2024 | 4.20 ppt | 3.00 ppt | Detected |
| NEtFOSAA | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 8/28/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFUnA | 8/28/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFOA | 8/28/2024 | 6.60 ppt | 4.00 ppt | Detected |
| NMeFOSAA | 8/28/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFMBA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 8/28/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 8/28/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 8/28/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 8/28/2024 | 13.00 ppt | 3.00 ppt | Detected |
| PFMPA | 8/28/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 8/28/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
Health-based violations on Pico Rivera - City, Water Dept.
4 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA1910042.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
17 violations · 40,600 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
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 Pico Rivera - City, Water Dept.
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.