Full contaminant data, sample history, and sourcing for Chenango County. For readers who want to go beyond the summary.
Contaminant Data — All Analytes
43 well testing events on record, covering
23 analytes.
Data spans 1953 to 2023.
Contaminant
Samples
Years
Detection Rate
Distribution LowModHigh
vs. Limit
vs. NY Avg
Manganese
27
1965–2019
78%
250% of limit
~ typical
Radon
19
2004–2019
100%
45% of limit
↓ 59% below
Iron
29
1963–2019
90%
16% of limit
↓ 92% below
Arsenic
24
1972–2019
79%
9% of limit
↓ 51% below
Chloride
30
1963–2019
100%
4% of limit
↓ 88% below
Fluoride
27
1965–2019
89%
2% of limit
↓ 55% below
HFPO-DA (GenX)
municipal
6
2024
0%
—
—
Lead
24
1972–2019
67%
2% of limit
↓ 61% below
Nitrate
27
1965–2019
52%
10% of limit
~ typical
Nitrite
19
2004–2019
0%
—
—
PFHxS
municipal
6
2024
0%
—
—
PFNA
municipal
6
2024
0%
—
—
PFOA
municipal
6
2024
0%
—
—
PFOS
municipal
6
2024
0%
—
—
Sulfate
29
1963–2019
100%
6% of limit
↓ 55% below
Uranium
19
2004–2019
100%
1% of limit
↓ 44% below
Total Coliform
5
2004–2019
21%
—
~ typical
Sodium
28
1963–2019
100%
—
↓ 77% below
pH
38
1963–2019
100%
—
~ typical
PFBS
municipal
6
2024
0%
—
—
Hardness
29
1963–2019
100%
—
~ typical
Fecal Coliform
5
2004–2019
5%
—
~ typical
E. coli
5
2004–2019
0%
—
—
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 NY.
Compare your result with Chenango County
Of the 24 arsenic tests on record for Chenango County (1972–2019),
21% found none, and half were below 0.425 µg/L.
Of the 30 chloride tests on record for Chenango County (1963–2019),
0% found none, and half were below 8.78 mg/L.
Of the 27 fluoride tests on record for Chenango County (1965–2019),
11% found none, and half were below 100 µg/L.
Of the 29 iron tests on record for Chenango County (1963–2019),
10% found none, and half were below 42.4 µg/L.
Of the 24 lead tests on record for Chenango County (1972–2019),
33% found none, and half were below 0.165 µg/L.
Of the 27 manganese tests on record for Chenango County (1965–2019),
22% found none, and half were below 60.9 µg/L.
Of the 27 nitrate tests on record for Chenango County (1965–2019),
48% found none.
Of the 29 sulfate tests on record for Chenango County (1963–2019),
0% found none, and half were below 15.2 mg/L.
Data Coverage & Gaps
Well-sampled analytes (15+ samples)
Manganese 27 samples
Radon 19 samples
Iron 29 samples
Arsenic 24 samples
Chloride 30 samples
Fluoride 27 samples
Lead 24 samples
Nitrate 27 samples
Nitrite 19 samples
Sulfate 29 samples
Uranium 19 samples
Sodium 28 samples
pH 38 samples
Hardness 29 samples
Limited data (<15 samples) — interpret with caution
Total Coliform 5 samples
Fecal Coliform 5 samples
E. coli 5 samples
No private-well PFAS data for Chenango County
We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Chenango 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 →
CDC Health Outcome Correlations
Where contaminants detected in Chenango 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.
This report aggregates data from the following public databases:
Water Quality Portal (WQP) — groundwater sample results for Chenango County from EPA, USGS, and state agencies. Browse WQP data →
EPA Safe Drinking Water Information System (SDWIS) — public water system inventory used to estimate the share of residents on private wells. Browse SDWIS →
Census ACS 5-Year Estimates — well and cistern household counts (variable DP04_0074E) used to calculate the private-well percentage for Chenango County. Census data explorer →
USGS Aquifer Atlas — principal aquifer type underlying Chenango County, which informs which contaminants are geologically likely. USGS Aquifer Atlas →
EPA UCMR 5 (2023–2025) — PFAS occurrence data from public water systems, used as a proxy indicator for aquifer PFAS exposure. Rows marked "municipal" in the table above come from this source. About UCMR 5 →
EPA Toxics Release Inventory (TRI) — industrial facility chemical releases near Chenango County, used in contamination risk scoring. TRI Explorer →
EPA Superfund NPL — National Priorities List sites in or near Chenango County, used in contamination risk scoring. Superfund site search →
CDC PLACES — county-level health outcome prevalence (kidney disease, cancer, heart disease) correlated with detected contaminants. About CDC PLACES →
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 NY with at least one sample for that analyte.