County profile · EPA SDWIS + UCMR5
Kauai County, Hawaii
19 SDWIS-listed public water systems serve 79,166 people in Kauai County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 19
- SDWIS water systems Middle third of counties
- 415
- Total violations Lower third of counties
- 94.7%
- SDWIS systems w/ a violation Middle third of counties
- 0.0%
- UCMR5 PFAS rate (6 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet HI007 · Kauai County 19 sys · 415 viol · #682/3254
VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · ABOVE-PEER · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 94.7% flagged
- HEALTH-LOW 10.8% health
- RANK-UPPER #682/3254
- ABOVE-PEER +12.2 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 95%
- SYS-SMALL 19 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Honolulu County ( -12.2 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Kauai County ranks #682 of 3,254 counties by people served, and #4 of 4 counties in Hawaii. See methodology · corpus placement.
Kauai County standing, mid-flagged corpus third
Flagged-system rate 94.7% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 10.8% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #682 of 3,254 · #4 of 4 in Hawaii.
Flagged-rate neighbourhood around Kauai County
Lowest/highest poles plus in-state counties nearest Kauai County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
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 | - |
Compare beyond Hawaii
Mid-flagged peers for Kauai County
Cross-state counties nearest Kauai County on flagged-system share (94.7%) and cumulative violation count (415). In-state neighbours stay on the compliance plate above.
Similar flagged-system rate
Nearest cross-state counties by % of SDWIS systems with at least one violation on record.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.