Nantucket County, Massachusetts
SDWIS compliance plate
Sheet MA019 · Nantucket County 5 sys · 347 viol · #1296/3254
VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 6.3% health
- RANK-UPPER #1296/3254
- PHOTO-FINISH ±0.8 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-TINY 5 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Barnstable County ( -0.8 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Nantucket County ranks #1,296 of 3,254 counties by people served, and #14 of 14 counties in Massachusetts. See methodology · corpus placement.
Nantucket County standing, mid-flagged corpus third
Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 6.3% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,296 of 3,254 · #14 of 14 in Massachusetts.
Flagged-rate neighbourhood around Nantucket County
Lowest/highest poles plus in-state counties nearest Nantucket County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Wannacomet Water Company | 27,703 | 197 | Clean |
| Siasconset Water Department | 3,000 | 89 | - |
| Surfside Beach | 1,500 | 29 | - |
| Wauwinet House | 300 | 30 | - |
| Sankaty Head Golf Club Inc. | 60 | 2 | - |
Compare beyond Massachusetts
Mid-flagged peers for Nantucket County
Cross-state counties nearest Nantucket County on flagged-system share (100.0%) and cumulative violation count (347). 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.