Non-Transient Non-Community Water System · PWS CA1502231
Rosamond School Water System
Operator location Rosamond, California - 79% of 94 violations are health-based (upper-third health share (> 23%)); surface water source; 940 served per SDWIS.
- 940
- People served (this PWS)
- 94
- EPA violations (this PWS)
- 74
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Rosamond School Water System standing, high SDWIS violation third
79% of 94 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 79% is upper-third health share (> 23%). Population rank #20,538 of 29,740 among systems serving 500+.
The verdict
Rosamond School Water System sits in the upper third of the sitemap cohort by violation count (94), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (940; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 79% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #20,538 of 29,740
- Population · /systems
- #1,239 of 1,701
- Population · CA
- 94
- Total EPA violations on record
- 79%
- 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
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 2
- County
- Kern
- School/Daycare
- Yes
- MCL Violations
- 74
- Monitoring Violations
- 14
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 73 | 2025 |
| Coliform (TCR) | MR | 5 | 2002 |
| Arsenic | MR | 3 | 2008 |
| Consumer Confidence Rule | Other | 2 | 2007 |
| Lead and Copper Rule | MR | 2 | 1996 |
| Nitrate | MR | 2 | 1993 |
| Revised Total Coliform Rule | MON | 2 | 2020 |
| Coliform (TCR) | MCL | 1 | 2009 |
Violation Count vs. the National Corpus
Rosamond School Water System has 94 recorded EPA violations, 72% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 28% carry more. 79% of this system's own violations are health-based (74 of 94), and it ranks #20,538 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)
94 Around the middle fewer violations than 28% 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 Rosamond School Water System
74 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA1502231.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
94 violations · 940 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Rosamond School 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.