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Counties → New Jersey

Sussex County, New Jersey

SDWIS compliance plate

Sheet NJ037 · Sussex County 479 sys · 27,540 viol · #337/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-MID · SRC-GW · SYS-LARGE · BOOK-FULL

  • VIOL-SEVERE 92.1% flagged
  • HEALTH-LOW 11.4% health
  • RANK-TOP #337/3254
  • PHOTO-FINISH ±0.6 pp
  • PFAS-MID 41.7% detect
  • SRC-GW GW lead 99%
  • SYS-LARGE 479 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Monmouth County (+ 0.6 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Sussex County ranks #337 of 3,254 counties by people served, and #16 of 21 counties in New Jersey. See methodology · corpus placement.

Sussex County standing, lower-flagged corpus third

Flagged-system rate 92.1% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 11.4% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 41.7% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #337 of 3,254 · #16 of 21 in New Jersey.

Flagged-rate neighbourhood around Sussex County

Lowest/highest poles plus in-state counties nearest Sussex County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Ocean · lowest Monmouth · near Gloucester · near 91.1% 92.1% 92.6% 94.3% 94.5% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Sparta Twp Water Utility - Lake Mohawk 17,625 765 Detected
Newton Water & Sewer Utility 8,300 267 Clean
Hopatcong Water Dept 7,224 462 Detected
Sussex County Fairgrounds 6,246 26 -
Veolia Water New Jersey Vernon Valley 5,517 15 Detected
Franklin Bd of Public Works 5,500 81 Clean
Mountain Creek Resort 5,041 217 Clean
Gordon Byram Assoc LLC 4,075 38 Clean
Stanhope W Dept 3,730 418 Detected
Walmart 3,695 22 Clean
Hamburg Board of Public 3,382 344 Detected
Skylands Ball Park 3,020 41 -
Wawa 8440 2,995 2 -
Ogdensburg W Dept 2,800 404 -
Kittatinny Reg High Scho 2,400 93 -
Sussex W Dept 2,201 278 -
Lowes Retail Store #1976 2,144 20 -
Vernon Valley Plaza LLC 2,140 30 -
Dales Market & Jimmy Pizza 2,000 53 -
Montague Water Co. 1,983 183 -
Hardyston Twp Mua 1,963 203 -
Byram Quick Check #183 1,917 7 -
Quick Chek 1,855 11 -
Big N Ames Plaza 1,818 201 -
Quick Chek 1,815 8 -
High Point Reg High Scho 1,750 120 Clean
Vernon Twp High School 1,714 108 -
Sparta Twp Water Utility -- Highlands 1,618 270 -
S-W Branch Library 1,608 17 -
Branchville W Dept 1,500 175 -
Rolling Hills/Lounsberry Hollow School 1,455 116 -
Forest Lakes Water 1,410 29 -
Nexxt Enterprises LLC 1,325 115 -
Byram Lakes Elem School 1,265 108 -
Lake Lenape Water Co 1,250 180 -
Quick Chek Store 43 Wantage 1,213 25 -
Newton McDonalds 1,207 34 -
Stillwater Water District 1 1,200 1,024 -
Quick Check #68 1,179 24 -
Brookwood Musconetcong River POA 1,087 137 -
Glen Meadow Mdidle School 1,058 49 -
Aqua NJ - Wallkill 1,050 213 -
Wawa 1,007 0 -
Lake Tamarack W Co 1,000 689 -
Tomahawk Lake - Rides 950 44 -
Tomahawk Lake - Parking Lot 950 21 -
Market Place 903 15 -
Black Bear Golf Club 840 41 -
Lafayette Township School 818 28 -
Veolia Water New Jersey Hampton 814 7 -

Compare beyond New Jersey

Lower-flagged peers for Sussex County

Cross-state counties nearest Sussex County on flagged-system share (92.1%) and cumulative violation count (27,540). 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.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

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.