Community Water System · PWS CA3601048
Barton Flats Water System
Operator location Angelus Oaks, California - 38% of 24 violations are health-based (upper-third health share (> 23%)); surface water source; 1,070 served per SDWIS.
- 1,070
- People served (this PWS)
- 24
- EPA violations (this PWS)
- 9
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Barton Flats Water System standing, mid SDWIS violation third
38% of 24 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 38% is upper-third health share (> 23%). Population rank #18,841 of 29,740 among systems serving 500+.
The verdict
Barton Flats Water System lands in the middle third by violation volume (24), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,070 (mid served population (≤ 3,309)). Health-based share is 38% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #18,841 of 29,740
- Population · /systems
- #1,135 of 1,701
- Population · CA
- 24
- Total EPA violations on record
- 38%
- 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
- Private
- Connections
- 16
- County
- San Bernardino
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 14
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | TT | 8 | 2017 |
| TTHM | MR | 6 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2022 |
| Nitrate | MR | 2 | 2022 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
Violation Count vs. the National Corpus
Barton Flats Water System has 24 recorded EPA violations, 36% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 63% carry more. 38% of this system's own violations are health-based (9 of 24), and it ranks #18,841 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)
24 Lower than most fewer violations than 63% 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 Barton Flats Water System
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 CA3601048.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
24 violations · 1,070 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Barton Flats 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.