Data & Methodology — Wyoming County

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

Contaminant Data — All Analytes

146 well testing events on record, covering 22 analytes. Data spans 1930 to 2025.

Contaminant Samples Years Detection Rate Distribution LowModHigh vs. Limit vs. PA Avg
Radon 3 2017–2022 100%
697% of limit ↑ 439% above
Manganese 46 1970–2023 91%
135% of limit ↓ 73% below
Iron 55 1930–2023 91%
17% of limit ↓ 97% below
PFOS municipal 153 2023–2025 37%
109% of limit ~ typical
PFOA municipal 152 2023–2025 28%
113% of limit ↑ 21% above
Chloride 57 1930–2023 100%
2% of limit ↓ 78% below
Arsenic 34 1982–2023 62%
26% of limit ~ typical
Nitrate 58 1930–2023 78%
5% of limit ↓ 74% below
Fluoride 38 1970–2023 89%
2% of limit ↓ 44% below
HFPO-DA (GenX) municipal 143 2023–2025 1%
28% of limit ↑ 24% above
Lead 30 1982–2023 27%
1% of limit ↓ 85% below
Nitrite 24 1982–2023 8%
10% of limit ↑ 570% above
PFHxS municipal 10 2023–2025 0%
— —
PFNA municipal 10 2023–2025 0%
— —
Sulfate 57 1930–2023 100%
4% of limit ↓ 77% below
Uranium 14 2017–2022 79%
6% of limit ↑ 149% above
Total Coliform 2 1998–2022 43%
— ~ typical
E. coli 2 1998–2022 0%
— —
Hardness 53 1930–2023 100%
— ↓ 42% below
PFBS municipal 143 2023–2025 22%
— ↓ 26% below
pH 56 1969–2023 100%
— ~ typical
Sodium 55 1930–2023 100%
— ↓ 57% 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 PA.

Compare your result with Wyoming County

Of the 34 arsenic tests on record for Wyoming County (1982–2023), 38% found none, and half were below 0.895 µg/L.

Of the 57 chloride tests on record for Wyoming County (1930–2023), 0% found none, and half were below 6 mg/L.

Of the 38 fluoride tests on record for Wyoming County (1970–2023), 11% found none, and half were below 100 µg/L.

Of the 55 iron tests on record for Wyoming County (1930–2023), 9% found none, and half were below 50 µg/L.

Of the 30 lead tests on record for Wyoming County (1982–2023), 73% found none.

Of the 46 manganese tests on record for Wyoming County (1970–2023), 9% found none, and half were below 31.2 µg/L.

Of the 58 nitrate tests on record for Wyoming County (1930–2023), 22% found none, and half were below 244 µg/L.

Of the 142 pfoa tests on record for Wyoming County (2025), 71% found none.

Of the 143 pfos tests on record for Wyoming County (2025), 62% found none.

Of the 57 sulfate tests on record for Wyoming County (1930–2023), 0% found none, and half were below 10 mg/L.

Have a number from your lab? Enter it to see where it falls. Nothing is sent anywhere.

Want the full picture for your well? Check all your results.

Data Coverage & Gaps

Well-sampled analytes (15+ samples)

  • Manganese 46 samples
  • Iron 55 samples
  • PFOS 153 samples
  • PFOA 152 samples
  • Chloride 57 samples
  • Arsenic 34 samples
  • Nitrate 58 samples
  • Fluoride 38 samples
  • HFPO-DA (GenX) 143 samples
  • Lead 30 samples
  • Nitrite 24 samples
  • Sulfate 57 samples
  • Hardness 53 samples
  • PFBS 143 samples
  • pH 56 samples
  • Sodium 55 samples

Limited data (<15 samples) — interpret with caution

  • Radon 3 samples
  • Uranium 14 samples
  • Total Coliform 2 samples
  • E. coli 2 samples

Public vs. Private Water in Wyoming County

99 Active public water systems
30,701 Residents on public water
72% Households on private wells

Public water systems in Wyoming 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 Wyoming 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 Wyoming County Prevalence PA Average Source Year
Arsenic Cancer incidence rate 529.9% 448.6% 2022
Arsenic Cancer prevalence 6.1% 7.0% 2020
Arsenic Kidney disease rate 2.5% 3.0% 2020
Lead Heart disease rate 6.0% 7.2% 2020

Source: CDC PLACES county-level estimates. Raw data: Download Wyoming 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 PA with at least one sample for that analyte.

Last updated: 2026-08-04

Full methodology →