County profile · EPA SDWIS + UCMR5
Union County, New Jersey
7 SDWIS-listed public water systems serve 778,855 people in Union County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 7
- SDWIS water systems Smaller third of counties
- 855
- Total violations Middle third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- 100.0%
- UCMR5 PFAS rate (3 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet NJ039 · Union County 7 sys · 855 viol · #83/3254
VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-SW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 12.3% health
- RANK-TOP #83/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 100.0% detect
- SRC-SW SW lead 57%
- SYS-TINY 7 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Essex County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Union County ranks #83 of 3,254 counties by people served, and #3 of 21 counties in New Jersey. See methodology · corpus placement.
Union 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 12.3% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 100.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #83 of 3,254 · #3 of 21 in New Jersey.
Flagged-rate neighbourhood around Union County
Lowest/highest poles plus in-state counties nearest Union County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| NJ American Water - Raritan | 615,430 | 601 | Detected |
| NJ American Water - Liberty | 134,000 | 80 | Detected |
| Rahway Water Department | 27,300 | 65 | Detected |
| Winfield Mutual Housing | 1,600 | 60 | - |
| Crest View Club Corp | 250 | 17 | - |
| Crestview Swim Club | 250 | 22 | - |
| Cranford Swim & Tennis Club | 25 | 10 | - |
Compare beyond New Jersey
Mid-flagged peers for Union County
Cross-state counties nearest Union County on flagged-system share (100.0%) and cumulative violation count (855). 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.