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Kauai County, HI Water Quality

Water quality data for 10 public water systems serving Kauai County, Hawaii — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 10 water systems · 23 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Kauai County Earns a A

Kauai County: 23 communities across 10 water systems. 100.0% have no open violations.

  • Median lead where detected: none detected
  • 0 communities with a lead detection, 23 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 11 with significant inspection deficiencies
  • 100.0% of communities have no open violations
—
Median Lead Level
County-wide, 90th percentile
10
Water Systems
Active CWS & NTNCWS
100%
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
  • Kalaheo
    Not detected
    No federal limits exceeded on record
    A
  • Kekaha
    Not detected
    No federal limits exceeded on record
    A
  • Eleele
    Not detected
    No federal limits exceeded on record
    A
  • Lawai
    Not detected
    No federal limits exceeded on record
    A
  • Hanapepe
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Kapaa
    Not detected
    3 significant inspection deficiencies
    B
  • Lihue
    Not detected
    3 significant inspection deficiencies
    B
  • Wailua Homesteads
    Not detected
    3 significant inspection deficiencies
    B
  • Hanamaulu
    Not detected
    3 significant inspection deficiencies
    B
  • Wailua
    Not detected
    3 significant inspection deficiencies
    B

All Cities in Kauai County

Kapaa Not detected B
Lihue Not detected B
Wailua Homesteads Not detected B
Kalaheo Not detected A
Hanamaulu Not detected B
Kekaha Not detected A
Kilauea Not detected A
Eleele Not detected A
Lawai Not detected A
Wailua Not detected B
Hanapepe Not detected A
Koloa Not detected A
Puhi Not detected B
Princeville Not detected A
Anahola Not detected B
Waimea Not detected A
Poipu Not detected A
Omao Not detected A
Kaumakani Not detected B
Haena Not detected B
Wainiha Not detected B
Hanalei Not detected B
Kalihiwai Not detected A
Showing 23 cities
No active violations Active violations

About Kauai County Drinking Water

Kauai County is served by 10 water systems covering 23 communities. No community here has an open violation on record.

Lead was not detected in any community in Kauai County that reported a result.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 11 of them.

Frequently Asked Questions

Is Kauai County tap water safe to drink?▼
No community in Kauai County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Kauai County?▼
No community reported a lead detection.
How many water systems serve Kauai County?▼
10 community water systems serve 23 communities here.
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