Suffolk County, Massachusetts
SDWIS compliance plate
Sheet MA025 · Suffolk County 8 sys · 111 viol · #7/3254
VIOL-SEVERE · HEALTH-HIGH · RANK-TOP · BELOW-PEER · PFAS-MID · SRC-SW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 87.5% flagged
- HEALTH-HIGH 64.0% health
- RANK-TOP #7/3254
- BELOW-PEER 1.2 pp cleaner
- PFAS-MID 25.0% detect
- SRC-SW SW lead 75%
- SYS-TINY 8 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Bristol County (+ 1.2 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Suffolk County ranks #7 of 3,254 counties by people served, and #1 of 14 counties in Massachusetts. See methodology · corpus placement.
Suffolk County standing, lower-flagged corpus third
Flagged-system rate 87.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 64.0% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #7 of 3,254 · #1 of 14 in Massachusetts.
Flagged-rate neighbourhood around Suffolk County
Lowest/highest poles plus in-state counties nearest Suffolk County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Mwra | 2,660,000 | 6 | - |
| Boston Water and Sewer Commission (Mwra) | 675,647 | 8 | Clean |
| Revere Water Division (Mwra) | 62,186 | 34 | Detected |
| Chelsea Water Dept. (Mwra) | 38,319 | 34 | Clean |
| Winthrop Water Division, (Mwra) | 19,316 | 26 | Clean |
| Rocky Mt Sprg @ Supreme Liq Boston Vnd | 400 | 2 | - |
| Deer Island (Mwra) | 350 | 0 | - |
| Rocky Mt Spring @ Roslindale Plaza Vnd | 25 | 1 | - |
Compare beyond Massachusetts
Lower-flagged peers for Suffolk County
Cross-state counties nearest Suffolk County on flagged-system share (87.5%) and cumulative violation count (111). 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.