Tanacross, AK 99776

1 water system • 108 residents

Severe water quality issues - filtration essential

Score: 5/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

Contaminants Detected

536

Violations on Record

Health-Based Violations

Recent Violations

Grade Breakdown

Contaminant Count0 / 25

Violation History0 / 25

Contaminant Severity5 / 25

System Compliance0 / 15

Enforcement History0 / 10

Total Score5%

5 / 100 points

Recommended Water Filters

✓Point-of-Use Carbon Filter (NSF-certified for lead)
✓Reverse Osmosis or Ion Exchange Filter
✓Ultraviolet (UV) Purification
✓Whole Home Carbon Filter System

Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Tanacross vs AK & National Average

Detected Contaminants

68 contaminants detected across water systems serving this ZIP code

Contaminant	Category
Atrazine	Agricultural
Glyphosate	Agricultural
Nitrate	Agricultural
Simazine	Agricultural
Arsenic	Heavy Metal
Barium	Heavy Metal
Cadmium	Heavy Metal
Chromium	Heavy Metal
Lead and Copper Rule	Heavy Metal
Mercury	Heavy Metal
Selenium	Heavy Metal
Fluoride	Inorganic
Coliform (TCR)	Microorganism
Revised Total Coliform Rule	Microorganism
1,1,1-Trichloroethane	Other
1,1,2-Trichloroethane	Other
1,2-DIBROMO-3-CHLOROPROPANE	Other
1,2-Dichloropropane	Other
2,3,7,8-TCDD	Other
2,4-D	Other
2,4,5-TP	Other
Benzo(a)pyrene	Other
BHC-GAMMA	Other
Carbofuran	Other
Chlordane	Other
Consumer Confidence Rule	Other
Dalapon	Other
Di(2-ethylhexyl) adipate	Other
Di(2-ethylhexyl) phthalate	Other
DICHLOROMETHANE	Other
Dinoseb	Other
Diquat	Other
Endothall	Other
Endrin	Other
ETHYLENE DIBROMIDE	Other
Groundwater Rule	Other
Heptachlor	Other
Heptachlor epoxide	Other
Hexachlorocyclopentadiene	Other
LASSO	Other
Methoxychlor	Other
OXAMYL	Other
Pentachlorophenol	Other
Picloram	Other
Public Notice	Other
Total Polychlorinated Biphenyls (PCB)	Other
Toxaphene	Other
Combined Radium (-226 and -228)	Radiological
Combined Uranium	Radiological
Gross Alpha, Excl. Radon and U	Radiological
1,1-Dichloroethylene	Volatile Organic
1,2-Dichloroethane	Volatile Organic
1,2,4-Trichlorobenzene	Volatile Organic
Benzene	Volatile Organic
Carbon tetrachloride	Volatile Organic
CHLOROBENZENE	Volatile Organic
cis-1,2-Dichloroethylene	Volatile Organic
Ethylbenzene	Volatile Organic
HEXACHLOROBENZENE	Volatile Organic
o-Dichlorobenzene	Volatile Organic
p-Dichlorobenzene	Volatile Organic
Styrene	Volatile Organic
Tetrachloroethylene	Volatile Organic
Toluene	Volatile Organic
trans-1,2-Dichloroethylene	Volatile Organic
Trichloroethylene	Volatile Organic
Vinyl chloride	Volatile Organic
Xylenes, Total	Volatile Organic

Water System Information

Systems Serving This ZIP:: TANACROSS WATER SYSTEM
Population Served:: 108
Systems With Violations:: 1 of 1
Major Violations:: 424
Enforcement Actions:: 489

Nearby Areas

99738

Eagle

99764

Northway

99780

Tok

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.