Community Water System · PWS CA2110001
Inverness Public Utility Dist
Operator location Inverness, California - 92% of 99 violations are health-based (upper-third health share (> 23%)); surface water source; 1,445 served per SDWIS.
- 1,445
- People served (this PWS)
- 99
- EPA violations (this PWS)
- 91
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Inverness Public Utility Dist standing, high SDWIS violation third
92% of 99 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 92% is upper-third health share (> 23%). Population rank #16,317 of 29,740 among systems serving 500+.
The verdict
Inverness Public Utility Dist sits in the upper third of the sitemap cohort by violation count (99), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,445 (mid served population (≤ 3,309)). Health-based share is 92% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #16,317 of 29,740
- Population · /systems
- #1,023 of 1,701
- Population · CA
- 99
- Total EPA violations on record
- 92%
- 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
- Local
- Connections
- 519
- County
- Marin
- School/Daycare
- No
- MCL Violations
- 87
- Monitoring Violations
- 6
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 67 | 2010 |
| Total Haloacetic Acids (HAA5) | MCL | 14 | 2014 |
| Coliform (TCR) | MCL | 6 | 2006 |
| Surface Water Treatment Rule | TT | 4 | 1993 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2005 |
| TTHM | MR | 3 | 2005 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2025 |
Violation Count vs. the National Corpus
Inverness Public Utility Dist has 99 recorded EPA violations, 73% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 92% of this system's own violations are health-based (91 of 99), and it ranks #16,317 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)
99 Around the middle fewer violations than 27% 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 Inverness Public Utility Dist
91 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA2110001.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
99 violations · 1,445 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Inverness Public Utility Dist
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.