Water Quality in 99779 — Tok, AK
EPA data for TETLIN UTILITY SYSTEM
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 99779 in Tok, Alaska is served by TETLIN UTILITY SYSTEM (EPA ID: AK2380638). This system provides water to approximately 150 people from groundwater sources.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 4 | No |
| Stage 1 DBP Rule | Treatment Technique | 3 | No |
| Lead | Inorganic | 1 | No |
| PFOA | PFAS | 1 | No |
| PFNA | PFAS | 1 | No |
| Monochloroacetic Acid | Disinfection Byproducts | 1 | No |
| Dichloroacetic Acid | Disinfection Byproducts | 1 | No |
| Bromodichloromethane | Disinfection Byproducts | 1 | No |
| Dibromochloromethane | Disinfection Byproducts | 1 | No |
| Bromoform | Disinfection Byproducts | 1 | No |
| Chlorodibromomethane | Disinfection Byproducts | 1 | No |
| Trichloroacetic Acid | Disinfection Byproducts | 1 | No |
| Monobromoacetic Acid | Disinfection Byproducts | 1 | No |
| Dibromoacetic Acid | Disinfection Byproducts | 1 | No |
| Bromochloroacetic Acid | Disinfection Byproducts | 1 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
What You Can Do
- Review your annual Consumer Confidence Report (CCR) — Your utility publishes this each July
- Test your home’s water — Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed — Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Alaska
- 99501 (Anchorage) — 263 violations
- 99505 (Jber)
- 99545 (Kongiganak) — 353 violations
- 99546 (Adak) — 94 violations
- 99547 (Atka) — 133 violations
- 99548 (Chignik Lake) — 97 violations
- 99550 (Port Lions) — 81 violations
- 99551 (Akiachak) — 78 violations
- 99552 (Akiak) — 15 violations
- 99553 (Akutan)
- 99554 (Alakanuk) — 423 violations
- 99556 (Anchor Point) — 9 violations
- 99558 (Anvik) — 167 violations
- 99559 (Bethel) — 125 violations
- 99561 (Chefornak) — 203 violations
- 99563 (Chevak) — 35 violations
- 99565 (Chignik Lagoon)
- 99567 (Chugiak) — 187 violations
- 99569 (Clarks Point) — 30 violations
- 99571 (Cold Bay) — 4 violations
Nearby Water Quality Reports
- 99573 (Copper Center) — 120 mi — 19 violations
- 99588 (Glennallen) — 122 mi — 4 violations
- 99701 (Fairbanks) — 196 mi — 8 violations
- 99574 (Cordova) — 208 mi — 15 violations
- 99623 (Wasilla) — 251 mi — 4 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for TETLIN UTILITY SYSTEM (AK2380638) on EPA.gov.
Frequently Asked Questions
Is the tap water in 99779 safe to drink?
Based on EPA records, the water system serving ZIP code 99779 has only monitoring/reporting violations, which are procedural in nature. However, individual home conditions (old pipes, well water) can affect quality.
Where does 99779’s water come from?
The primary water source for this area is groundwater. TETLIN UTILITY SYSTEM serves approximately 150 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 99779 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 99779. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 99779?
Radon zone data is not available for ZIP code 99779. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.