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Kusilvak Census Area, AK Water Quality

Water quality data for 12 public water systems serving Kusilvak Census Area, Alaska — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 12 water systems · 13 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Kusilvak Census Area Earns a C

Kusilvak Census Area: 13 communities across 12 water systems. 84.6% have no open violations.

  • Median lead where detected: 1.69 ppb
  • 10 communities with a lead detection, 3 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 13 with significant inspection deficiencies
  • 84.6% of communities have no open violations
1.69 ppb
Median Lead Level
County-wide, 90th percentile
12
Water Systems
Active CWS & NTNCWS
84%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Chevak
    4.90 ppb
    2 significant inspection deficiencies
    B
  • Pilot Station
    4.80 ppb
    1 significant inspection deficiency
    C
  • Marshall
    2.49 ppb
    2 significant inspection deficiencies
    C
  • Scammon Bay
    0.68 ppb
    4 significant inspection deficiencies
    C
  • Kotlik
    2.00 ppb
    Copper above the 1,300 ppb action level
    C
⚠ Needs Attention
  • Mountain Village
    1.47 ppb
    5 violations currently open
    F
  • Emmonak
    0.94 ppb
    Copper above the 1,300 ppb action level
    D
  • Hooper Bay
    1.40 ppb
    Copper above the 1,300 ppb action level
    D
  • Alakanuk
    Not detected
    Copper above the 1,300 ppb action level
    D
  • Nunam Iqua
    1.90 ppb
    Copper above the 1,300 ppb action level
    D
County Lead Level — Median 1.69 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.69 ppb — 11.3% of the federal action level
Systems by Lead Level
Under 5 ppb
10
No Data
3

All Cities in Kusilvak Census Area

Alakanuk Not detected D
Chevak 4.90 ppb B
Emmonak 0.94 ppb D
Hooper Bay 1.40 ppb D
Kotlik 2.00 ppb C
Marshall 2.49 ppb C
Mountain Village 1.47 ppb F
Nunam Iqua 1.90 ppb D
Pilot Station 4.80 ppb C
Pitkas Point Not detected C
Russian Mission 1.30 ppb D
Scammon Bay 0.68 ppb C
St. Mary's Not detected C
Showing 13 cities
No active violations Active violations

About Kusilvak Census Area Drinking Water

Kusilvak Census Area is served by 12 water systems covering 13 communities. 85% have no open violations.

Of the communities reporting lead results, 10 recorded a detection, with a median of 1.69 ppb — 11% of the federal action level. 3 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 13 of them.

Frequently Asked Questions

Is Kusilvak Census Area tap water safe to drink?▼
85% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Kusilvak Census Area?▼
Among communities with a detection the median is 1.69 ppb, 11% of the 15 ppb action level. 3 reported none detected and 0 reported no result.
How many water systems serve Kusilvak Census Area?▼
12 community water systems serve 13 communities here.
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