Community Water System · PWS NJ1710304
Big Oak Rehab
Elmer, New Jersey 08318 - drinking water served from groundwater sources to 259 people, tracked in EPA SDWIS and UCMR5.
- 259
- People served
- 305
- EPA violations
- 168
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 305 drinking-water violations at Big Oak Rehab, 55% of them health-based - above the New Jersey per-system average.
- 305
- Total EPA violations on record
- 55%
- Health-based (MCL / treatment failure)
- 259
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Big Oak Rehab
Big Oak Rehab is a private-owned community water system that delivers drinking water to 259 residents in Elmer, New Jersey (Salem County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 305 total violations for this system , of which 168 (55%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 123 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.
The most frequently cited contaminant at this system is Combined Radium (-226 and -228), recorded in 85 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across New Jersey, EPA tracks 3,428 public water systems serving 9,570,926 people, with 204,988 cumulative violations and 22,229 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 59.8 violations. Statewide, 208 of 264 UCMR5-tested systems have reported PFAS detections (78.8%).
Big Oak Rehab's 305 violations sit above the New Jersey average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 1
- County
- Salem
- School/Daycare
- No
- MCL Violations
- 159
- Monitoring Violations
- 123
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 85 | 2018 |
| Gross Alpha, Excl. Radon and U | MCL | 43 | 2017 |
| Nitrate | MCL | 31 | 2024 |
| Revised Total Coliform Rule | MON | 11 | 2024 |
| Revised Total Coliform Rule | RPT | 11 | 2024 |
| Chlorine | MR | 9 | 2024 |
| Lead and Copper Rule | TT | 9 | 2025 |
| Lead and Copper Rule | MR | 6 | 2024 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2016 |
| cis-1,2-Dichloroethylene | MR | 4 | 2016 |
| Xylenes, Total | MR | 4 | 2016 |
| DICHLOROMETHANE | MR | 4 | 2016 |
| p-Dichlorobenzene | MR | 4 | 2016 |
| 1,1-Dichloroethylene | MR | 4 | 2016 |
| trans-1,2-Dichloroethylene | MR | 4 | 2016 |
| 1,2-Dichloropropane | MR | 4 | 2016 |
| Trichloroethylene | MR | 4 | 2016 |
| 1,1,2-Trichloroethane | MR | 4 | 2016 |
| CHLOROBENZENE | MR | 4 | 2016 |
| Toluene | MR | 4 | 2016 |
| Ethylbenzene | MR | 4 | 2016 |
| Benzene | MR | 4 | 2016 |
| Styrene | MR | 4 | 2016 |
| Tetrachloroethylene | MR | 4 | 2016 |
| 1,1,1-Trichloroethane | MR | 4 | 2016 |
| o-Dichlorobenzene | MR | 4 | 2016 |
| 1,2-Dichloroethane | MR | 4 | 2016 |
| Carbon tetrachloride | MR | 4 | 2016 |
| Vinyl chloride | MR | 4 | 2016 |
| Radium-226 | MR | 2 | 2024 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Big Oak Rehab.
EPA SDWIS, Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID NJ1710304 on SDWISSource: EPA SDWIS Federal Reports Search
New Jersey Drinking Water Authority
NJ DEP, Bureau of Safe Drinking Water is the primacy agency that licenses and inspects Big Oak Rehab under EPA-delegated authority.
Open NJ regulator portalViolation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2025 | Lead and Copper Rule | TT | 9 | SDWIS / NJ1710304 / 5000 |
| 2024 | Nitrate | MCL | 31 | SDWIS / NJ1710304 / 1040 |
| 2024 | Revised Total Coliform Rule | MON | 11 | SDWIS / NJ1710304 / 8000 |
| 2024 | Revised Total Coliform Rule | RPT | 11 | SDWIS / NJ1710304 / 8000 |
| 2024 | Chlorine | MR | 9 | SDWIS / NJ1710304 / 0999 |
| 2024 | Lead and Copper Rule | MR | 6 | SDWIS / NJ1710304 / 5000 |
| 2024 | Radium-226 | MR | 2 | SDWIS / NJ1710304 / 4020 |
| 2024 | Radium-228 | MR | 2 | SDWIS / NJ1710304 / 4030 |
| 2024 | Combined Uranium | MR | 2 | SDWIS / NJ1710304 / 4006 |
| 2024 | Gross Alpha, Excl. Radon and U | MR | 2 | SDWIS / NJ1710304 / 4000 |
| 2024 | Combined Radium (-226 and -228) | MR | 2 | SDWIS / NJ1710304 / 4010 |
| 2018 | Combined Radium (-226 and -228) | MCL | 85 | SDWIS / NJ1710304 / 4010 |
| 2017 | Gross Alpha, Excl. Radon and U | MCL | 43 | SDWIS / NJ1710304 / 4000 |
| 2016 | 1,2,4-Trichlorobenzene | MR | 4 | SDWIS / NJ1710304 / 2378 |
| 2016 | cis-1,2-Dichloroethylene | MR | 4 | SDWIS / NJ1710304 / 2380 |
How Big Oak Rehab Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Big Oak Rehab | New Jersey avg | Federal benchmark |
|---|---|---|---|
| Total violations | 305 | 59.8 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 168 | 6.5 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 78.8% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 259 | 2,792 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 3,428 regulated public water systems in New Jersey.
Federal MCL reference, Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026) |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is Big Oak Rehab water safe to drink? ▼
How many people does Big Oak Rehab serve? ▼
What type of violations does Big Oak Rehab have? ▼
Has PFAS been detected in Big Oak Rehab water? ▼
What water source does Big Oak Rehab use? ▼
Where does this data come from? ▼
Read our methodology - 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 system's figures are rendered directly from 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.