Data & Methodology — Camden County

Full contaminant data, sample history, and sourcing for Camden County. For readers who want to go beyond the summary.

Contaminant Data — All Analytes

1541 well testing events on record, covering 22 analytes. Data spans 1906 to 2025.

Contaminant Samples Years Detection Rate Distribution LowModHigh vs. Limit vs. NJ Avg
Iron 986 1906–2023 95%
207% of limit ↓ 57% below
Manganese 975 1906–2023 98%
149% of limit ↓ 69% below
PFOA municipal 126 2020–2025 14%
132% of limit ↓ 33% below
PFOS municipal 127 2020–2025 8%
199% of limit ~ typical
Arsenic 308 1906–2023 53%
10% of limit ↓ 40% below
Radon 59 1988–2023 100%
30% of limit ↓ 29% below
Chloride 1447 1906–2023 100%
6% of limit ↓ 79% below
Lead 296 1906–2023 29%
1% of limit ↓ 94% below
Nitrate 664 1906–2023 81%
10% of limit ↓ 60% below
PFNA municipal 126 2020–2025 3%
62% of limit ↑ 41% above
Sulfate 1021 1906–2023 99%
8% of limit ↓ 52% below
Nitrite 362 1906–2023 18%
1% of limit ↓ 41% below
Uranium 97 1988–2018 67%
0% of limit ↓ 97% below
PFHxS municipal 126 2020–2025 3%
42% of limit ~ typical
HFPO-DA (GenX) municipal 127 2020–2025 0%
— —
Fluoride 869 1906–2023 73%
5% of limit ~ typical
pH 1077 1906–2023 100%
— ~ typical
E. coli 1 2006–2018 67%
— ~ typical
Sodium 979 1906–2023 100%
— ↓ 74% below
Hardness 1000 1906–2023 100%
— ↓ 56% below
Total Coliform 1 2006–2018 67%
— ~ typical
PFBS municipal 127 2020–2025 2%
— ↓ 39% below

Distribution shows the share of samples in each concentration band relative to the EPA Maximum Contaminant Level (MCL): Low = below half the MCL, Moderate = between half and the MCL, High = above the MCL. Analytes without an MCL (e.g. sodium, pH) show — in the limit columns. State average is based on county median values across NJ.

Compare your result with Camden County

Of the 308 arsenic tests on record for Camden County (1906–2023), 47% found none, and half were below 60 ng/L.

Of the 1447 chloride tests on record for Camden County (1906–2023), 0% found none, and half were below 15 mg/L.

Of the 869 fluoride tests on record for Camden County (1906–2023), 27% found none, and half were below 100 µg/L.

Of the 986 iron tests on record for Camden County (1906–2023), 5% found none, and half were below 500 µg/L.

Of the 296 lead tests on record for Camden County (1906–2023), 71% found none.

Of the 975 manganese tests on record for Camden County (1906–2023), 2% found none, and half were below 70 µg/L.

Of the 664 nitrate tests on record for Camden County (1906–2023), 19% found none, and half were below 295 µg/L.

Of the 1021 sulfate tests on record for Camden County (1906–2023), 1% found none, and half were below 19 mg/L.

Of the 97 uranium tests on record for Camden County (1988–2018), 33% found none, and half were below 17 ng/L.

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Data Coverage & Gaps

Well-sampled analytes (15+ samples)

  • Iron 986 samples
  • Manganese 975 samples
  • PFOA 126 samples
  • PFOS 127 samples
  • Arsenic 308 samples
  • Radon 59 samples
  • Chloride 1447 samples
  • Lead 296 samples
  • Nitrate 664 samples
  • PFNA 126 samples
  • Sulfate 1021 samples
  • Nitrite 362 samples
  • Uranium 97 samples
  • PFHxS 126 samples
  • HFPO-DA (GenX) 127 samples
  • Fluoride 869 samples
  • pH 1077 samples
  • Sodium 979 samples
  • Hardness 1000 samples
  • PFBS 127 samples

Limited data (<15 samples) — interpret with caution

  • E. coli 1 sample
  • Total Coliform 1 sample

Public vs. Private Water in Camden County

101 Active public water systems
282,295 Residents on public water
5% Households on private wells

Public water systems in Camden County are regulated by the EPA and must test and report contaminant levels. Private well owners are responsible for their own testing — there is no routine monitoring of private wells by any government agency.

CDC Health Outcome Correlations

Where contaminants detected in Camden County have established associations with specific health outcomes, we cross-reference CDC PLACES county-level prevalence data. This is a contextual signal, not a causal claim.

Contaminant Associated Condition Camden County Prevalence NJ Average Source Year
Arsenic Cancer prevalence 6.6% 6.2% 2020
Arsenic Kidney disease rate 2.6% 2.7% 2020
Lead Heart disease rate 5.3% 5.8% 2020

Source: CDC PLACES county-level estimates. Raw data: Download Camden County CDC PLACES data →

Data Sources

This report aggregates data from the following public databases:

Methodology

Raw records are downloaded from the Water Quality Portal and normalized to µg/L (ppb). Records are deduplicated by sample ID and date, and certified outliers are excluded. Analyte names are mapped to EPA canonical forms. Detection rates, distribution bands, and MCL comparisons are computed from the normalized dataset.

Distribution bands use the EPA Maximum Contaminant Level as the threshold: concentrations below 50% of the MCL are classed as Low, between 50% and 100% as Moderate, and above 100% as High. For analytes without an MCL (sodium, hardness, pH), distribution is not computed.

State comparison uses the median of county median values across all counties in NJ with at least one sample for that analyte.

Last updated: 2026-08-04

Full methodology →