Community Water System · PWS CA1910060
La Puente Valley Cwd
Operator location La Puente, California - 0% of 1 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 8,243 served per SDWIS.
- 8,243
- People served (this PWS)
- 1
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
La Puente Valley Cwd standing, low SDWIS violation third
0% of 1 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). UCMR5: UCMR5 tested, none detected. Population rank #5,488 of 29,740 among systems serving 500+.
The verdict
La Puente Valley Cwd is in the lower third by violation count (1; 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 (8,243; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is only 0% - almost all of this trail is monitoring or reporting. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #5,488 of 29,740
- Population · /systems
- #514 of 1,701
- Population · CA
- 1
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,500
- County
- Los Angeles
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
Violation Count vs. the National Corpus
La Puente Valley Cwd has 1 recorded EPA violations, 4% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 95% carry more. 0% of this system's own violations are health-based (0 of 1), and it ranks #5,488 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)
1 Among the lowest violation counts fewer violations than 95% 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. 0 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFPeA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 7/17/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFUnA | 7/17/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/17/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 6:2 FTS | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMPA | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 7/17/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 7/17/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 7/17/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| 8:2 FTS | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| ADONA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 1/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 1/27/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 1/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 1/27/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHpS | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 1/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 1/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 1/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 1/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 1/27/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 1/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 1/27/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFBA | 1/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 1/27/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
Health-based violations on La Puente Valley Cwd
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA1910060.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
1 violations · 8,243 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 La Puente Valley Cwd
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.