Community Water System · PWS 100211202
Metlakatla
Operator location Metlakatla, EPA Region 10 — Tribal Water Systems - 30% of 368 violations are health-based (upper-third health share (> 23%)); surface water source; 1,575 served per SDWIS.
- 1,575
- People served (this PWS)
- 368
- EPA violations (this PWS)
- 111
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Metlakatla standing, high SDWIS violation third
30% of 368 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 30% is upper-third health share (> 23%). Population rank #15,500 of 29,740 among systems serving 500+.
The verdict
Metlakatla sits in the upper third of the sitemap cohort by violation count (368), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,575 (mid served population (≤ 3,309)). Health-based share is 30% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #15,500 of 29,740
- Population · /systems
- #23 of 52
- Population · 10
- 368
- Total EPA violations on record
- 30%
- 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
- 565
- School/Daycare
- No
- MCL Violations
- 23
- Monitoring Violations
- 203
- Treatment Tech Violations
- 88
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 66 | 2025 |
| Public Notice | Other | 37 | 2025 |
| Nitrate | MR | 22 | 2007 |
| Total Haloacetic Acids (HAA5) | MR | 19 | 2025 |
| Coliform (TCR) | MR | 18 | 2009 |
| Total Haloacetic Acids (HAA5) | MCL | 17 | 2023 |
| TTHM | MR | 15 | 2014 |
| Consumer Confidence Rule | Other | 14 | 2022 |
| Lead | TT | 9 | 1993 |
| COPPER, FREE | TT | 7 | 1996 |
| Coliform (TCR) | MCL | 6 | 2012 |
| Benzene | MR | 6 | 2017 |
| Antimony, Total | MR | 5 | 2009 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 5 | 2021 |
| Surface Water Treatment Rule | MR | 5 | 2024 |
| Surface Water Treatment Rule | TT | 5 | 1992 |
| Fluoride | MR | 3 | 2011 |
| Chlorine | MR | 3 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | MR | 3 | 2024 |
| 1,1,1-Trichloroethane | MR | 3 | 2017 |
| Nickel | MR | 2 | 2009 |
| Barium | MR | 2 | 2009 |
| Thallium, Total | MR | 2 | 2009 |
| Asbestos | MR | 2 | 2009 |
| Selenium | MR | 2 | 2009 |
| 2,3,7,8-TCDD | MR | 2 | 2009 |
| cis-1,2-Dichloroethylene | MR | 2 | 2017 |
| Xylenes, Total | MR | 2 | 2017 |
| p-Dichlorobenzene | MR | 2 | 2017 |
| Chromium | MR | 2 | 2009 |
Violation Count vs. the National Corpus
Metlakatla has 368 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 30% of this system's own violations are health-based (111 of 368), and it ranks #15,500 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)
368 Higher than most more violations than 93% 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 Metlakatla
111 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for 100211202.
Sources: EPA SDWIS
Nationwide peers
368 violations · 1,575 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 Metlakatla
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.