Data & Methodology — Sandusky County

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

Contaminant Data — All Analytes

97 well testing events on record, covering 20 analytes. Data spans 1962 to 2024.

Contaminant Samples Years Detection Rate Distribution LowModHigh vs. Limit vs. OH Avg
Sulfate 58 1978–2014 100%
54% of limit ↑ 23% above
Iron 84 1978–2014 96%
60% of limit ↓ 86% below
Chloride 82 1978–2014 100%
10% of limit ↓ 32% below
Manganese 83 1978–2014 82%
12% of limit ↓ 93% below
Lead 36 1987–2014 67%
0% of limit ↓ 100% below
Arsenic 37 1987–2014 68%
0% of limit ↓ 100% below
Fluoride 72 1978–2014 100%
28% of limit ↑ 174% above
HFPO-DA (GenX) municipal 7 2024–2025 0%
— —
Nitrate 54 1986–1997 61%
3% of limit ↓ 40% below
Nitrite 54 1986–1997 67%
0% of limit ↓ 69% below
PFHxS municipal 7 2024–2025 0%
— —
PFNA municipal 7 2024–2025 0%
— —
PFOA municipal 7 2024–2025 0%
— —
PFOS municipal 7 2024–2025 0%
— —
Radon 1 1991 100%
8% of limit ↓ 65% below
Uranium 31 1986–1987 100%
1% of limit ↓ 44% below
Hardness 72 1978–2014 100%
— ~ typical
PFBS municipal 7 2024–2025 0%
— —
pH 84 1978–2005 100%
— ~ typical
Sodium 84 1978–2014 100%
— ↓ 54% 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 OH.

Compare your result with Sandusky County

Of the 37 arsenic tests on record for Sandusky County (1987–2014), 32% found none.

Of the 82 chloride tests on record for Sandusky County (1978–2014), 0% found none, and half were below 25.5 mg/L.

Of the 72 fluoride tests on record for Sandusky County (1978–2014), 0% found none, and half were below 1.12 mg/L.

Of the 84 iron tests on record for Sandusky County (1978–2014), 4% found none, and half were below 179 µg/L.

Of the 36 lead tests on record for Sandusky County (1987–2014), 33% found none.

Of the 83 manganese tests on record for Sandusky County (1978–2014), 18% found none, and half were below 2 µg/L.

Of the 54 nitrate tests on record for Sandusky County (1986–1997), 39% found none, and half were below 19.5 µg/L.

Of the 58 sulfate tests on record for Sandusky County (1978–2014), 0% found none, and half were below 135 mg/L.

Of the 31 uranium tests on record for Sandusky County (1986–1987), 0% found none, and half were below 0.39 µg/L.

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Data Coverage & Gaps

Well-sampled analytes (15+ samples)

  • Sulfate 58 samples
  • Iron 84 samples
  • Chloride 82 samples
  • Manganese 83 samples
  • Lead 36 samples
  • Arsenic 37 samples
  • Fluoride 72 samples
  • Nitrate 54 samples
  • Nitrite 54 samples
  • Uranium 31 samples
  • Hardness 72 samples
  • pH 84 samples
  • Sodium 84 samples

Limited data (<15 samples) — interpret with caution

  • Radon 1 sample

No private-well PFAS data for Sandusky County

We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Sandusky County. PFAS testing for private wells requires a dedicated lab panel (~$300–$500). If you are near a military base, airport, or industrial site, consider testing proactively. Learn more about PFAS →

Public vs. Private Water in Sandusky County

54 Active public water systems
36,728 Residents on public water
50% Households on private wells

Public water systems in Sandusky 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 Sandusky 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 Sandusky County Prevalence OH Average Source Year
Lead Heart disease rate 8.6% 7.6% 2020

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

Last updated: 2026-08-04

Full methodology →