Kalskag, AK: High Radon Risk — 50/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Although conditions vary by service area, Kalskag's water systems collectively show below-average compliance within AK — health-based violations are documented throughout the city, and the overall grade reflects a pattern rather than isolated incidents.
How Kalskag Compares
Data: EPA SDWIS Last verified: 2026-06-03
Kalskag Water: The Quick Version
- Homes built before 1986: 36% — older plumbing may contain lead solder.
- CDC health risk index: 15.88 — above typical levels.
Water Systems Serving Kalskag
A single utility carries the primary residential water load in Kalskag, AK — the dominant provider across 1 federally tracked system.
Overview
We track water quality and home safety data for 1 ZIP code in Kalskag, Alaska (population ~232), covering 1 community water system serving approximately 373 people region-wide.
No EPA violations recorded across any ZIP codes in Kalskag — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Kalskag: D (50/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Kalskag water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Kalskag
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 99607 | D | TULUKSAK WATER SYSTEM | 373 |
All ZIP Codes in Kalskag
- 99607 [D]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Kalskag
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Old Is Kalskag's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
What does a median build year of 1997 mean for water safety in Kalskag? It means the housing stock straddles two key plumbing thresholds: the 1986 federal ban on lead solder in copper plumbing, and the pre-1970 era when lead pipes were commonly installed for service lines. A meaningful share of homes predates one or both of those cutoffs, creating varied risk levels across the city's housing inventory.
Most homes in Kalskag were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Protecting Children from Lead in Kalskag
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Wherever 36% of local housing was built before solder rules changed — as is the case in Kalskag — a faucet-level sample closes the gap that aggregate utility data cannot.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Kalskag
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 36% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Kalskag, AK