County profile · EPA SDWIS + UCMR5
Dukes County, Massachusetts
25 SDWIS-listed public water systems serve 42,168 people in Dukes County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 25
- SDWIS water systems Middle third of counties
- 1,211
- Total violations Middle third of counties
- 96.0%
- SDWIS systems w/ a violation Middle third of counties
- 33.3%
- UCMR5 PFAS rate (3 tested) Middle third of counties with tests
SDWIS compliance plate
Sheet MA007 · Dukes County 25 sys · 1,211 viol · #1066/3254
VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-MID · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 96.0% flagged
- HEALTH-LOW 8.0% health
- RANK-UPPER #1066/3254
- PHOTO-FINISH ±0.3 pp
- PFAS-MID 33.3% detect
- SRC-GW GW lead 100%
- SYS-SMALL 25 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Worcester County ( -0.3 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Dukes County ranks #1,066 of 3,254 counties by people served, and #13 of 14 counties in Massachusetts. See methodology · corpus placement.
Dukes County standing, mid-flagged corpus third
Flagged-system rate 96.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 8.0% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 33.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #1,066 of 3,254 · #13 of 14 in Massachusetts.
Flagged-rate neighbourhood around Dukes County
Lowest/highest poles plus in-state counties nearest Dukes County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Oak Bluffs Water District | 24,000 | 167 | Detected |
| Edgartown Water Department | 8,027 | 19 | Clean |
| Tisbury Water Works | 6,082 | 48 | Clean |
| Menemsha Water Company | 841 | 74 | - |
| Marthas Vineyard Airport | 750 | 4 | - |
| Gosnold Water Dept | 425 | 52 | - |
| West Tisbury Elementary School | 375 | 10 | - |
| 7A Foods | 250 | 52 | - |
| Chilmark Community Center | 200 | 44 | - |
| State Road Restaurant | 200 | 74 | - |
| M.v. Public Charter School | 150 | 140 | - |
| Chappaquiddick Beach Club, Inc. | 125 | 9 | - |
| Chilmark Tavern | 99 | 26 | - |
| Chilmark School | 90 | 117 | - |
| Beach Plum Inn | 80 | 44 | - |
| Focus Study Center | 80 | 35 | - |
| Kuehns Way LLC | 80 | 0 | - |
| Menemsha Inn | 60 | 67 | - |
| Polly Hill Arboretum, Inc. | 52 | 83 | - |
| American Youth Hostel | 40 | 43 | - |
| Lamberts Cove Inn and Restaurant | 40 | 32 | - |
| Island Childrens School | 36 | 51 | - |
| Scotts Grove LLC | 36 | 2 | - |
| West Tisbury Town Hall | 25 | 17 | - |
| West Tisbury Free Public Library | 25 | 1 | - |
Compare beyond Massachusetts
Mid-flagged peers for Dukes County
Cross-state counties nearest Dukes County on flagged-system share (96.0%) and cumulative violation count (1,211). 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.