Honolulu County, Hawaii
SDWIS compliance plate
Sheet HI003 · Honolulu County 40 sys · 1,423 viol · #50/3254
VIOL-SEVERE · HEALTH-MID · RANK-TOP · ABOVE-PEER · PFAS-LOW · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 82.5% flagged
- HEALTH-MID 38.5% health
- RANK-TOP #50/3254
- ABOVE-PEER +5.6 pp
- PFAS-LOW 10.5% detect
- SRC-GW GW lead 95%
- SYS-MID 40 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Maui County ( -5.6 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Honolulu County ranks #50 of 3,254 counties by people served, and #1 of 4 counties in Hawaii. See methodology · corpus placement.
Honolulu County standing, lower-flagged corpus third
Flagged-system rate 82.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 38.5% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 10.5% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #50 of 3,254 · #1 of 4 in Hawaii.
Flagged-rate neighbourhood around Honolulu County
Lowest/highest poles plus in-state counties nearest Honolulu County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Hawaii
Lower-flagged peers for Honolulu County
Cross-state counties nearest Honolulu County on flagged-system share (82.5%) and cumulative violation count (1,423). 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. 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.