Community Water System · PWS AK2260197
Dillingham Water System
Operator location Dillingham, Alaska - upper-third violation load (> 74 violations) with 533 EPA violations; groundwater source; 2,419 served (PWS-level, not municipal population).
- 2,419
- People served (this PWS)
- 533
- EPA violations (this PWS)
- 5
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Dillingham Water System standing, high SDWIS violation third
533 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%). Population rank #12,185 of 29,740 among systems serving 500+.
The verdict
Dillingham Water System sits in the upper third of the sitemap cohort by violation count (533), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,419 (mid served population (≤ 3,309)). Health-based share is 1% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #12,185 of 29,740
- Population · /systems
- #32 of 164
- Population · AK
- 533
- Total EPA violations on record
- 1%
- 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
- Native American
- Connections
- 215
- County
- Dillingham Census Area
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 414
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 33 | 2024 |
| Coliform (TCR) | MR | 14 | 2010 |
| Consumer Confidence Rule | Other | 13 | 2023 |
| Lead and Copper Rule | MR | 11 | 2025 |
| Nitrate | MR | 10 | 2018 |
| LASSO | MR | 10 | 2025 |
| BHC-GAMMA | MR | 9 | 2025 |
| Dalapon | MR | 9 | 2025 |
| Diquat | MR | 9 | 2025 |
| Endothall | MR | 9 | 2025 |
| Di(2-ethylhexyl) adipate | MR | 9 | 2025 |
| OXAMYL | MR | 9 | 2025 |
| Simazine | MR | 9 | 2025 |
| Picloram | MR | 9 | 2025 |
| Carbofuran | MR | 9 | 2025 |
| Atrazine | MR | 9 | 2025 |
| 2,3,7,8-TCDD | MR | 9 | 2025 |
| Heptachlor | MR | 9 | 2025 |
| Heptachlor epoxide | MR | 9 | 2025 |
| Benzo(a)pyrene | MR | 9 | 2025 |
| 2,4-D | MR | 9 | 2025 |
| HEXACHLOROBENZENE | MR | 9 | 2025 |
| Pentachlorophenol | MR | 9 | 2025 |
| Total Polychlorinated Biphenyls (PCB) | MR | 9 | 2025 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 9 | 2025 |
| ETHYLENE DIBROMIDE | MR | 9 | 2025 |
| Toxaphene | MR | 9 | 2025 |
| Hexachlorocyclopentadiene | MR | 9 | 2025 |
| Endrin | MR | 9 | 2025 |
| Methoxychlor | MR | 9 | 2025 |
Violation Count vs. the National Corpus
Dillingham Water System has 533 recorded EPA violations, 96% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 4% carry more. 1% of this system's own violations are health-based (5 of 533), and it ranks #12,185 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)
533 Higher than most more violations than 96% 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
SDWIS compliance record for Dillingham Water System
533 violations on record for AK2260197; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS
Nationwide peers
533 violations · 2,419 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 Dillingham Water System
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Alaska compares on the same EPA violation measures. Alaska 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.