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Counties → Hawaii

Kauai County, Hawaii

Water Systems
19
Population Served
79,166
Total Violations
415
45 health-based
PFAS Detected
0
of 6 tested

Violation Analysis

94.7%
Systems with Violations
21.8
Avg Violations per System
10.8%
Health-Based Violations

Water Source Types

GW
18 systems (95%)
SW
1 system (5%)

PFAS Contamination

6
Systems Tested
0
PFAS Detected
0.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Kauai Hawaii water systems by violation status, EPA SDWIS records.

No violations on record (1) One or more violations (18)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Lihue-Kapaa 34,854 37 Clean
Kalaheo-Koloa 12,660 3 Clean
Princeville 6,911 13 Clean
Kekaha-Waimea 5,998 21 Clean
Hanapepe-Eleele 5,592 11 Clean
Kilauea 3,420 1 Clean
Anahola 2,473 1 -
Kokee State Park 2,000 83 -
Gay & Robinson 1,271 58 -
Pacific Missile Range Facility 1,200 15 -
Haena-Wainiha 833 4 -
Hanalei 500 1 -
Anahola Farm Lots 385 2 -
Polihale State Park 300 39 -
Kealia 260 25 -
Kahili Mountain Park 175 82 -
Anini 174 4 -
Moloaa Irrigation Cooperative 100 15 -
Koolau Ranch 60 0 -

Other Counties in Hawaii

Honolulu County
40 systems · 1,128,562 served · 1,423 violations
Maui County
39 systems · 169,182 served · 2,585 violations
Hawaii County
39 systems · 144,021 served · 811 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Kauai County? ▼
Kauai County has 415 total drinking water violations across 19 water systems, of which 45 are health-based violations. 94.7% of systems have at least one violation.
How many people get water from Kauai County systems? ▼
Water systems in Kauai County serve approximately 79,166 people through 19 public water systems.
Has PFAS been detected in Kauai County water? ▼
Of 6 water systems tested for PFAS in Kauai County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Kauai County? ▼
Water systems in Kauai County use GW (18 systems), SW (1 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 10.8% of Kauai County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.