Community Water System · PWS CA3700923
Lake Morena's Oak Shores MWC
Operator location Campo, California - 77% of 179 violations are health-based (upper-third health share (> 23%)); groundwater source; 670 served per SDWIS.
- 670
- People served (this PWS)
- 179
- EPA violations (this PWS)
- 137
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lake Morena's Oak Shores MWC standing, high SDWIS violation third
77% of 179 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 77% is upper-third health share (> 23%). Population rank #24,871 of 29,740 among systems serving 500+.
The verdict
Lake Morena's Oak Shores MWC sits in the upper third of the sitemap cohort by violation count (179), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (670; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 77% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #24,871 of 29,740
- Population · /systems
- #1,424 of 1,701
- Population · CA
- 179
- Total EPA violations on record
- 77%
- 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
- 201
- County
- San Diego
- School/Daycare
- No
- MCL Violations
- 136
- Monitoring Violations
- 28
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 73 | 2015 |
| Combined Uranium | MCL | 36 | 2015 |
| Coliform (TCR) | MCL | 21 | 2005 |
| Coliform (TCR) | MR | 20 | 2009 |
| Nitrate-Nitrite | MCL | 6 | 2009 |
| Consumer Confidence Rule | Other | 5 | 2006 |
| Nitrate | Other | 2 | 2007 |
| Public Notice | Other | 2 | 2007 |
| Revised Total Coliform Rule | MON | 2 | 2024 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1981 |
| Nitrite | MR | 2 | 2002 |
| Lead and Copper Rule | MR | 2 | 2002 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
Violation Count vs. the National Corpus
Lake Morena's Oak Shores MWC has 179 recorded EPA violations, 84% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 16% carry more. 77% of this system's own violations are health-based (137 of 179), and it ranks #24,871 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)
179 Higher than most more violations than 84% 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 Lake Morena's Oak Shores MWC
137 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA3700923.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
179 violations · 670 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 Lake Morena's Oak Shores MWC
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.