County profile · EPA SDWIS + UCMR5
Middlesex County, New Jersey
35 SDWIS-listed public water systems serve 668,615 people in Middlesex County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 35
- SDWIS water systems Middle third of counties
- 2,949
- Total violations Upper third of counties
- 94.3%
- SDWIS systems w/ a violation Middle third of counties
- 92.3%
- UCMR5 PFAS rate (13 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet NJ023 · Middlesex County 35 sys · 2,949 viol · #103/3254
VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 94.3% flagged
- HEALTH-LOW 13.6% health
- RANK-TOP #103/3254
- PHOTO-FINISH ±0.2 pp
- PFAS-HIGH 92.3% detect
- SRC-GW GW lead 63%
- SYS-SMALL 35 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Gloucester County (+ 0.2 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Middlesex County ranks #103 of 3,254 counties by people served, and #7 of 21 counties in New Jersey. See methodology · corpus placement.
Middlesex County standing, mid-flagged corpus third
Flagged-system rate 94.3% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 13.6% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 92.3% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #103 of 3,254 · #7 of 21 in New Jersey.
Flagged-rate neighbourhood around Middlesex County
Lowest/highest poles plus in-state counties nearest Middlesex County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond New Jersey
Mid-flagged peers for Middlesex County
Cross-state counties nearest Middlesex County on flagged-system share (94.3%) and cumulative violation count (2,949). 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.