Community Water System · PWS CA2110005
Bolinas Community PUD
Operator location Bolinas, California - 89% of 142 violations are health-based (upper-third health share (> 23%)); surface water source; 2,483 served per SDWIS.
- 2,483
- People served (this PWS)
- 142
- EPA violations (this PWS)
- 127
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Bolinas Community PUD standing, high SDWIS violation third
89% of 142 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 89% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #12,021 of 29,740 among systems serving 500+.
The verdict
Bolinas Community PUD sits in the upper third of the sitemap cohort by violation count (142), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,483 (mid served population (≤ 3,309)). Health-based share is 89% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #12,021 of 29,740
- Population · /systems
- #844 of 1,701
- Population · CA
- 142
- Total EPA violations on record
- 89%
- 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
- 587
- County
- Marin
- School/Daycare
- No
- MCL Violations
- 118
- Monitoring Violations
- 5
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 61 | 2013 |
| TTHM | MCL | 57 | 2011 |
| Surface Water Treatment Rule | TT | 9 | 1993 |
| Coliform (TCR) | MR | 5 | 2006 |
Violation Count vs. the National Corpus
Bolinas Community PUD has 142 recorded EPA violations, 80% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 20% carry more. 89% of this system's own violations are health-based (127 of 142), and it ranks #12,021 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)
142 Higher than most more violations than 80% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NMeFOSAA | 9/12/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 9/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 9/12/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 9/12/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFPeA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 6/20/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 6/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMBA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 6/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/20/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 4:2 FTS | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 6/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMPA | 6/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 6/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 6/20/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 6/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 6/20/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFDA | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 6/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 6/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 6/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 6/20/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 6:2 FTS | 6/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 6/20/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFMPA | 3/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| NMeFOSAA | 3/22/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 3/22/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFBA | 3/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 3/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 3/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NEtFOSAA | 3/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 3/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 3/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 3/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 3/22/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 3/22/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 3/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 3/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 3/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 3/22/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 3/22/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Bolinas Community PUD
127 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA2110005.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
142 violations · 2,483 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 Bolinas Community PUD
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.