Contaminant Data — All Analytes
28 well testing events on record, covering
23 analytes.
Data spans 1949 to 2022.
| Contaminant |
Samples |
Years |
Detection Rate |
Distribution LowModHigh |
vs. Limit |
vs. NY Avg |
|
Radon
|
14 |
2002–2022
|
100% |
|
66% of limit
|
↓ 41% below
|
|
Iron
|
20 |
1971–2022
|
75% |
|
28% of limit
|
↓ 85% below
|
|
Manganese
|
20 |
1971–2022
|
75% |
|
40% of limit
|
↓ 87% below
|
|
Arsenic
|
20 |
1971–2022
|
65% |
|
1% of limit
|
↓ 92% below
|
|
Chloride
|
20 |
1971–2022
|
100% |
|
4% of limit
|
↓ 88% below
|
|
Fluoride
|
20 |
1971–2022
|
90% |
|
3% of limit
|
↓ 44% below
|
|
HFPO-DA (GenX)
municipal
|
12 |
2023–2024
|
0% |
|
— |
— |
|
Lead
|
20 |
1971–2022
|
50% |
|
1% of limit
|
↓ 65% below
|
|
Nitrate
|
20 |
1971–2022
|
80% |
|
3% of limit
|
↓ 76% below
|
|
Nitrite
|
15 |
1975–2022
|
20% |
|
1% of limit
|
~ typical
|
|
PFHxS
municipal
|
12 |
2023–2024
|
0% |
|
— |
— |
|
PFNA
municipal
|
12 |
2023–2024
|
0% |
|
— |
— |
|
PFOA
municipal
|
12 |
2023–2024
|
0% |
|
— |
— |
|
PFOS
municipal
|
12 |
2023–2024
|
0% |
|
— |
— |
|
Sulfate
|
20 |
1971–2022
|
100% |
|
4% of limit
|
↓ 69% below
|
|
Uranium
|
14 |
2002–2022
|
93% |
|
1% of limit
|
↓ 33% below
|
|
PFBS
municipal
|
12 |
2023–2024
|
0% |
|
— |
— |
|
Hardness
|
20 |
1971–2022
|
100% |
|
— |
↓ 49% below
|
|
Fecal Coliform
|
7 |
2006–2022
|
0% |
|
— |
— |
|
E. coli
|
7 |
2006–2022
|
0% |
|
— |
— |
|
Total Coliform
|
7 |
2006–2022
|
0% |
|
— |
— |
|
Sodium
|
20 |
1971–2022
|
100% |
|
— |
↓ 79% below
|
|
pH
|
20 |
1971–2022
|
100% |
|
— |
~ typical
|
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 Fulton County
Of the 20 arsenic tests on record for Fulton County (1971–2022),
35% found none.
Of the 20 chloride tests on record for Fulton County (1971–2022),
0% found none, and half were below 9.05 mg/L.
Of the 20 fluoride tests on record for Fulton County (1971–2022),
10% found none, and half were below 110 µg/L.
Of the 20 iron tests on record for Fulton County (1971–2022),
25% found none, and half were below 45 µg/L.
Of the 20 lead tests on record for Fulton County (1971–2022),
50% found none, and half were below 35 ng/L.
Of the 20 manganese tests on record for Fulton County (1971–2022),
25% found none, and half were below 6.5 µg/L.
Of the 20 nitrate tests on record for Fulton County (1971–2022),
20% found none, and half were below 169 µg/L.
Of the 20 sulfate tests on record for Fulton County (1971–2022),
0% found none, and half were below 10.7 mg/L.
Data Sources
This report aggregates data from the following public databases:
- Water Quality Portal (WQP) — groundwater sample results for Fulton 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 Fulton County. Census data explorer →
- USGS Aquifer Atlas — principal aquifer type underlying Fulton 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 Fulton County, used in contamination risk scoring. TRI Explorer →
- EPA Superfund NPL — National Priorities List sites in or near Fulton 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.
Last updated: 2026-08-04
Full methodology →