SAN LORENZO VALLEY WATER DIST vs LOS ANGELES-CITY, DEPT. OF WATER & POWER
Water quality comparison — risk levels, violations, PFAS records, and contaminants
Quick Answer
LOS ANGELES-CITY, DEPT. OF WATER & POWER has a lower risk classification (safe). SAN LORENZO VALLEY WATER DIST has 1 open health-based violation and 522 PFAS records. LOS ANGELES-CITY, DEPT. OF WATER & POWER has 0 open health-based violations and 464 PFAS records.
California · CA4410014
Low Concern
Minor detections below regulatory limits. Routine monitoring adequate.
1
Open violations
522
PFAS records
California · CA1910067
No Concerns Detected
Water meets all safety standards with no detected exceedances.
0
Open violations
464
PFAS records
Head-to-Head Comparison
| Metric | SAN LORENZO VALLEY WATER DIST | LOS ANGELES-CITY, DEPT. OF WATER & POWER |
|---|---|---|
| State | California | California |
| Risk Level | Low Concern | No Concerns Detected |
| Population Served | 21,145 | 7,751,132 |
| Open Health Violations | 1 | 0 |
| Total Violations | 4 | 4 |
| PFAS Records | 522 | 464 |
| Ownership | Local | Local |
| Service Type | Surface water | Surface water |
| City Served | — | Los Angeles |
Contaminants in Violation Records
SAN LORENZO VALLEY WATER DIST
- Nitrate
LOS ANGELES-CITY, DEPT. OF WATER & POWER
No named contaminants in violation records.
Key Differences
SAN LORENZO VALLEY WATER DIST has a low risk rating vs. safe for LOS ANGELES-CITY, DEPT. OF WATER & POWER.
SAN LORENZO VALLEY WATER DIST has 1 open health-based violation vs. 0 for LOS ANGELES-CITY, DEPT. OF WATER & POWER.
SAN LORENZO VALLEY WATER DIST has 522 PFAS records vs. 464 for LOS ANGELES-CITY, DEPT. OF WATER & POWER.
What Should I Do?
If either utility shows open violations or elevated PFAS records, consider:
- Installing a reverse osmosis filter — removes PFAS, lead, arsenic, nitrates, and most heavy metals.
- Requesting your utility’s annual Consumer Confidence Report (CCR) for the most current test results.
- Ordering a certified lab water test if you want contaminant-specific data for your address.
Frequently Asked Questions
Which is safer — SAN LORENZO VALLEY WATER DIST or LOS ANGELES-CITY, DEPT. OF WATER & POWER?
LOS ANGELES-CITY, DEPT. OF WATER & POWER has a lower risk classification (safe). LOS ANGELES-CITY, DEPT. OF WATER & POWER has 0 open health-based violations compared to 1 for the other system.
What does "open health-based violation" mean?
An open health-based violation means a water system has exceeded an EPA Maximum Contaminant Level (MCL) or failed to meet a treatment technique — and the violation has not yet been resolved. These are the most serious type of water quality violations.
How current is this data?
Violation data comes from EPA's Safe Drinking Water Information System (SDWIS), which is updated as utilities report. PFAS data comes from EPA's UCMR 5 monitoring (2023–2025). Risk levels are recalculated daily.
What does PWSID mean?
PWSID stands for Public Water System ID — a unique federal identifier assigned to each community water system. You can use it to look up a system in EPA's ECHO database.