Well water in Lower Alloways Creek township, New Jersey
In Lower Alloways Creek township, 12% of 307 private wells tested between 2002 and 2024 had total coliform above the New Jersey limit (any detection), according to NJDEP.
309 private wells tested 2002 to 2024 in state summaries; 11 individual samples from 7 wells, 1980 to 2023. Data refreshed September 9, 2026.
What homeowner tests found
NJDEP Private Well Testing Act summaries: private wells tested and reported to the state, 2002 to 2024. Shares are against the level the state applies to each contaminant, named in the last column; several are stricter than EPA.
| Contaminant | Wells tested | Above state level | Median | 95th pct | Highest | State level | |
|---|---|---|---|---|---|---|---|
| Iron | 309 | 34% | 300 ug/L | ||||
| Total coliform | 307 | 12% | |||||
| Manganese | 309 | 5% | 50 ug/L | ||||
| PFOA | 63 | 2% | 14 ng/L | ||||
| Gross alpha | 304 | 1% | 15 pCi/L | ||||
| E. coli Fecal coliform or | 307 | <1% | |||||
| Nitrate | 309 | 0% | 10 mg/L | ||||
| Arsenic | 124 | 0% | 5 ug/L | ||||
| PFNA | 63 | 0% | 13 ng/L | ||||
| PFOS | 63 | 0% | 13 ng/L |
What individual samples found
Each row summarizes every public sample for that contaminant inside Lower Alloways Creek township. Above limit means above the EPA maximum contaminant level; where EPA has no enforceable limit, the row shows a health guideline or nuisance level instead.
| Contaminant | Samples | Detected | Above limit | Median | Highest | Limit | |
|---|---|---|---|---|---|---|---|
| Arsenic 1980 to 2023 | 11 | 55% | 0% | 0.14 | 1 | 10 ug/L EPA limit |
Sampled fewer than 10 times, too few to summarize: PFOA (3), PFOS (3), Copper (1), Iron (2).
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What this means
Among homeowners in Lower Alloways Creek township who sent a sample to the state lab, the health-based limits most often exceeded were total coliform (12% of 307 wells), PFOA (2% of 63 wells), and E. coli (<1% of 307 wells). These are ordinary wells tested by their owners, so the shares are the best available picture of a typical well here, with one caveat: people test more often when they suspect a problem.
Iron exceeds the state's advisory level in a sizable share of wells; this is mostly a taste, staining or diet issue rather than a toxicity one.
What to test for in Lower Alloways Creek township
- Iron34% of 309 local wells tested were above the New Jersey nuisance level.
- Total coliform12% of 307 local wells tested were above the New Jersey limit (any detection).
- Manganese5% of 309 local wells tested were above the New Jersey nuisance level.
- PFOA2% of 63 local wells tested were above the New Jersey limit.
- Gross alpha1% of 304 local wells tested were above the New Jersey limit.
- E. coli<1% of 307 local wells tested were above the New Jersey limit (any detection).
- CopperDetected in 100% of local samples.
- NitrateRecommended for every private well, especially near farms or septic systems.
Contamination sources on record in Lower Alloways Creek township
NJDEP records 20 regulated sites in Lower Alloways Creek township, among 20 regulated sites in total. Groundwater does not follow property lines, so a well within a few hundred feet of one of these is worth testing for what that site could release.
- 19
- registered underground storage tank sitesRegistered tanks are regulated and inspected; they matter most when they are old or near a shallow well.
- 1
- other remediation project
Treatment that fits the local profile
- Total coliform
- Inspect and repair the well cap and casing, then shock chlorinate and retest; UV disinfection whole-house; Chlorination system
- Iron
- Oxidizing filter whole-house; Water softener (low levels); Aeration plus filtration
- Manganese
- Oxidizing filter (greensand, birm) whole-house; Water softener (low levels); Point-of-use reverse osmosis
- Copper
- Neutralizing filter to raise pH; Point-of-use reverse osmosis
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Common questions
Is there arsenic in well water in Lower Alloways Creek township?
Arsenic was detected in 55% of 11 public well samples in Lower Alloways Creek township, and 0% were above the EPA limit of 10 ug/L. Arsenic has no taste or smell; a lab test is the only way to know your level.
How often should I test a private well in Lower Alloways Creek township?
Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.
Sources
- USGS Water Quality Portal: 20 samples in Lower Alloways Creek township. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
- NJDEP Private Well Testing Act summaries: summaries for 10 contaminants in Lower Alloways Creek township, up to 309 wells each. Share of private wells exceeding each standard in tests required at sale or lease under the New Jersey Private Well Testing Act, September 2002 to December 2024, published by NJDEP. Tests are untreated water at the time of sale or lease, so every well is counted once per transaction. Municipalities with fewer than ten wells are suppressed. Standards are New Jersey's: arsenic 5 ug/L, PFOA 14 ng/L, PFOS 13 ng/L, PFNA 13 ng/L, manganese and iron secondary standards. Uranium and PFAS were added to the required panel in 2021 and 2020, so their well counts are smaller. Retrieved September 9, 2026.
- NJDEP regulated sites: 20 regulated sites located in Lower Alloways Creek township. Known Contaminated Sites, regulated underground storage tank facilities and solid waste landfills from the New Jersey Department of Environmental Protection (NJ-GeoWeb). Retrieved September 9, 2026.
Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.