Community Water System · PWS CA3500527
Valenzuela Water System
Operator location Hollister, California - smaller served population (≤ 999) at 55 people served; 117 SDWIS violations on record from groundwater sources.
- 55
- People served (this PWS)
- 117
- EPA violations (this PWS)
- 26
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Valenzuela Water System standing, high SDWIS violation third
55 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 22% is middle-third health share (≤ 23%).
The verdict
Valenzuela Water System sits in the upper third of the sitemap cohort by violation count (117), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (55; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 22% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 117
- Total EPA violations on record
- 22%
- Health-based (MCL / treatment failure)
- 55
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 17
- County
- San Benito
- School/Daycare
- No
- MCL Violations
- 26
- Monitoring Violations
- 82
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 60 | 2007 |
| Nitrate | MCL | 19 | 2011 |
| Consumer Confidence Rule | Other | 7 | 2009 |
| Chlorine | MR | 5 | 2005 |
| Revised Total Coliform Rule | MON | 5 | 2025 |
| Coliform (TCR) | MCL | 5 | 1998 |
| Lead and Copper Rule | MR | 3 | 2005 |
| Asbestos | MR | 2 | 2000 |
| Nitrate-Nitrite | MCL | 2 | 2018 |
| Arsenic | MR | 2 | 2000 |
| Benzene | MR | 2 | 2000 |
| Nitrate | MR | 2 | 2000 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1981 |
Violation Count vs. the National Corpus
Valenzuela Water System has 117 recorded EPA violations, 76% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 24% carry more. 22% of this system's own violations are health-based (26 of 117), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
117 Higher than most more violations than 76% 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
Population served record for Valenzuela Water System
EPA SDWIS lists 55 people served and 17 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
117 violations · 55 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Valenzuela Water System
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.