Non-Transient Non-Community Water System · PWS 105338117
Suquamish Regional Public Water System
Operator location Suquamish, EPA Region 10 — Tribal Water Systems - 0% of 324 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 1,874 served per SDWIS.
- 1,874
- People served (this PWS)
- 324
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Suquamish Regional Public Water System standing, high SDWIS violation third
0% of 324 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). Population rank #14,136 of 29,740 among systems serving 500+.
The verdict
Suquamish Regional Public Water System sits in the upper third of the sitemap cohort by violation count (324), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,874 (mid served population (≤ 3,309)). Health-based share is only 0% - almost all of this trail is monitoring or reporting. No UCMR5 PFAS test appears for this system in this extract.
- #14,136 of 29,740
- Population · /systems
- #21 of 52
- Population · 10
- 324
- Total EPA violations on record
- 0%
- 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
- Native American
- Connections
- 9
- School/Daycare
- Yes
- MCL Violations
- 0
- Monitoring Violations
- 320
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| 1,2,4-Trichlorobenzene | MR | 9 | 2024 |
| o-Dichlorobenzene | MR | 9 | 2024 |
| p-Dichlorobenzene | MR | 9 | 2024 |
| Vinyl chloride | MR | 9 | 2024 |
| trans-1,2-Dichloroethylene | MR | 9 | 2024 |
| 1,1,1-Trichloroethane | MR | 9 | 2024 |
| 1,2-Dichloroethane | MR | 9 | 2024 |
| Carbon tetrachloride | MR | 9 | 2024 |
| 1,2-Dichloropropane | MR | 9 | 2024 |
| 1,1,2-Trichloroethane | MR | 9 | 2024 |
| Tetrachloroethylene | MR | 9 | 2024 |
| CHLOROBENZENE | MR | 9 | 2024 |
| Ethylbenzene | MR | 9 | 2024 |
| DICHLOROMETHANE | MR | 9 | 2024 |
| 1,1-Dichloroethylene | MR | 9 | 2024 |
| Benzene | MR | 9 | 2024 |
| Trichloroethylene | MR | 9 | 2024 |
| Toluene | MR | 9 | 2024 |
| Lead and Copper Rule | MR | 9 | 2020 |
| Styrene | MR | 9 | 2024 |
| cis-1,2-Dichloroethylene | MR | 9 | 2024 |
| Xylenes, Total | MR | 9 | 2024 |
| Revised Total Coliform Rule | MON | 6 | 2022 |
| Revised Total Coliform Rule | RPT | 4 | 2025 |
| Nitrate | MR | 3 | 2020 |
| Endrin | MR | 3 | 2020 |
| Dalapon | MR | 3 | 2020 |
| OXAMYL | MR | 3 | 2020 |
| Simazine | MR | 3 | 2020 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2020 |
Violation Count vs. the National Corpus
Suquamish Regional Public Water System has 324 recorded EPA violations, 92% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 8% carry more. 0% of this system's own violations are health-based (0 of 324), and it ranks #14,136 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)
324 Higher than most more violations than 92% 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 Suquamish Regional Public Water System
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for 105338117.
Sources: EPA SDWIS
Nationwide peers
324 violations · 1,874 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 Suquamish Regional Public Water System
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in EPA Region 10 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 10 — Tribal Water Systems 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.