Community Water System · PWS CA1910022
Calif State Polytechnical Univ - Pomona
Operator location Pomona, California - 27% of 33 violations are health-based (upper-third health share (> 23%)); surface water source; 29,854 served per SDWIS.
- 29,854
- People served (this PWS)
- 33
- EPA violations (this PWS)
- 9
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Calif State Polytechnical Univ - Pomona standing, mid SDWIS violation third
27% 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 27% is upper-third health share (> 23%). Population rank #1,875 of 29,740 among systems serving 500+.
The verdict
Calif State Polytechnical Univ - Pomona 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 (29,854; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 27% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #1,875 of 29,740
- Population · /systems
- #281 of 1,701
- Population · CA
- 33
- Total EPA violations on record
- 27%
- 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
- State
- Connections
- 148
- County
- Los Angeles
- School/Daycare
- Yes
- MCL Violations
- 8
- Monitoring Violations
- 21
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 6 | 2024 |
| Coliform (TCR) | MCL | 2 | 1993 |
| o-Dichlorobenzene | MR | 1 | 2021 |
| Benzene | MR | 1 | 2021 |
| Ethylbenzene | MR | 1 | 2021 |
| 1,2-Dichloropropane | MR | 1 | 2021 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
| 1,1-Dichloroethylene | MR | 1 | 2021 |
| 1,1,2-Trichloroethane | MR | 1 | 2021 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2021 |
| p-Dichlorobenzene | MR | 1 | 2021 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| Toluene | MR | 1 | 2021 |
| Vinyl chloride | MR | 1 | 2021 |
| 1,1,1-Trichloroethane | MR | 1 | 2021 |
| Trichloroethylene | MR | 1 | 2021 |
| Styrene | MR | 1 | 2021 |
| 1,2-Dichloroethane | MR | 1 | 2021 |
| trans-1,2-Dichloroethylene | MR | 1 | 2021 |
| Xylenes, Total | MR | 1 | 2021 |
| Tetrachloroethylene | MR | 1 | 2021 |
| Carbon tetrachloride | MR | 1 | 2021 |
| CHLOROBENZENE | MR | 1 | 2021 |
| cis-1,2-Dichloroethylene | MR | 1 | 2021 |
| DICHLOROMETHANE | MR | 1 | 2021 |
Violation Count vs. the National Corpus
Calif State Polytechnical Univ - Pomona has 33 recorded EPA violations, 45% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 54% carry more. 27% of this system's own violations are health-based (9 of 33), and it ranks #1,875 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
Health-based violations on Calif State Polytechnical Univ - Pomona
9 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA1910022.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
33 violations · 29,854 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 Calif State Polytechnical Univ - Pomona
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.