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Counties → Hawaii

Hawaii County, Hawaii

Water Systems
39
Population Served
144,021
Total Violations
811
595 health-based
PFAS Detected
0
of 11 tested

Violation Analysis

74.4%
Systems with Violations
20.8
Avg Violations per System
73.4%
Health-Based Violations

Water Source Types

GW
38 systems (97%)
SW
1 system (3%)

PFAS Contamination

11
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

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

No violations on record (10) One or more violations (29)

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
Hilo 39,477 170 Clean
North Kona 29,581 8 Clean
Waikoloa 12,100 14 Clean
South Kohala 9,612 283 Clean
South Kona 6,512 12 Clean
Olaa-Mountain View 6,467 0 Clean
North Kohala 4,933 5 Clean
Haina 4,563 0 Clean
Hawaii Volcanoes Nat.park 4,201 11 Clean
Hawaiian Beaches 3,546 19 Clean
Waiohinu-Naalehu 2,948 0 -
Papaikou 2,203 4 -
Kaupulehu 1,945 42 -
Lalamilo 1,895 3 -
Pahoa 1,885 11 -
Pepeekeo 1,450 2 -
Hawaiian Shores 1,360 1 -
Pahala 1,226 90 -
Laupahoehoe-Kapehu 1,169 8 -
Hawaiian Ocean View Estates 1,000 6 -
Kohala Ranch Water Co. 850 11 Clean
Paauilo 716 0 -
Honomu 645 0 -
Kukuihaele 483 33 -
Napuu Water Inc. 468 0 -
Hakalau-Wailea 402 4 -
Kalapana 275 11 -
Ookala (Dws) 264 15 -
Kona Water Service Company 260 0 -
Niulii 254 13 -
Keopu Water Association 250 2 -
Kilauea Military Camp 220 9 -
Punalu'u 200 15 -
Kawaihae Unit #1 193 3 -
Ninole 151 3 -
Waiki'i Ranch 102 0 -
New Moon Foundation 80 0 -
Wood Valley 75 0 -
Pepeekeo Water Association 60 3 -

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
Kauai County
19 systems · 79,166 served · 415 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Hawaii County? ▼
Hawaii County has 811 total drinking water violations across 39 water systems, of which 595 are health-based violations. 74.4% of systems have at least one violation.
How many people get water from Hawaii County systems? ▼
Water systems in Hawaii County serve approximately 144,021 people through 39 public water systems.
Has PFAS been detected in Hawaii County water? ▼
Of 11 water systems tested for PFAS in Hawaii County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Hawaii County? ▼
Water systems in Hawaii County use GW (38 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. 73.4% of Hawaii 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.