Community Water System · PWS AK2121510
South Tongass Water Utility
Operator location Ketchikan, Alaska - smaller served population (≤ 999) at 975 people served; 99 SDWIS violations on record from surface water sources.
- 975
- People served (this PWS)
- 99
- EPA violations (this PWS)
- 21
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
South Tongass Water Utility standing, high SDWIS violation third
975 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 21% is middle-third health share (≤ 23%). Population rank #20,088 of 29,740 among systems serving 500+.
The verdict
South Tongass Water Utility 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 smaller (975; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 21% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #20,088 of 29,740
- Population · /systems
- #67 of 164
- Population · AK
- 99
- Total EPA violations on record
- 21%
- 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
- 327
- County
- Ketchikan Gateway Borough
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 16
- Treatment Tech Violations
- 12
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 9 | 2025 |
| Surface Water Treatment Rule | TT | 6 | 2018 |
| Interim Enhanced Surface Water Treatment Rule | TT | 6 | 2015 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2016 |
| Surface Water Treatment Rule | MR | 4 | 2020 |
| Interim Enhanced Surface Water Treatment Rule | MR | 4 | 2019 |
| Consumer Confidence Rule | Other | 2 | 2017 |
| Coliform (TCR) | MR | 1 | 2012 |
| Chlorine | MR | 1 | 2012 |
Violation Count vs. the National Corpus
South Tongass Water Utility has 99 recorded EPA violations, 73% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 21% of this system's own violations are health-based (21 of 99), and it ranks #20,088 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
Population served record for South Tongass Water Utility
EPA SDWIS lists 975 people served and 327 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
99 violations · 975 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with South Tongass Water Utility
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.