Full contaminant data, sample history, and sourcing for Bradford County. For readers who want to go beyond the summary.
Contaminant Data — All Analytes
76 well testing events on record, covering
20 analytes.
Data spans 1956 to 2025.
Contaminant
Samples
Years
Detection Rate
Distribution LowModHigh
vs. Limit
vs. FL Avg
Iron
52
2017–2025
100%
56% of limit
↓ 72% below
Nitrate
20
1990
95%
40% of limit
↑ 1135% above
PFHxS
municipal
6
2023–2025
0%
—
—
Arsenic
52
2017–2025
100%
5% of limit
↓ 59% below
Chloride
71
1990–2025
100%
4% of limit
↓ 92% below
PFNA
municipal
6
2023–2025
0%
—
—
PFOA
municipal
6
2023–2025
0%
—
—
PFOS
municipal
6
2023–2025
0%
—
—
Fluoride
52
2017–2025
100%
8% of limit
~ typical
HFPO-DA (GenX)
municipal
6
2023–2025
0%
—
—
Nitrite
20
1990
25%
2% of limit
↑ 60% above
Lead
52
2017–2025
100%
1% of limit
↓ 58% below
Manganese
52
2017–2025
100%
10% of limit
↓ 60% below
Sulfate
72
1990–2025
100%
1% of limit
↓ 95% below
PFBS
municipal
6
2023–2025
0%
—
—
Sodium
52
2017–2025
100%
—
↓ 87% below
pH
71
1990–2025
100%
—
~ typical
Total Coliform
9
2017–2025
100%
—
~ typical
E. coli
5
2022–2025
100%
—
~ typical
Fecal Coliform
4
1990–2020
29%
—
~ 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 FL.
Compare your result with Bradford County
Of the 52 arsenic tests on record for Bradford County (2017–2025),
0% found none, and half were below 0.535 µg/L.
Of the 71 chloride tests on record for Bradford County (1990–2025),
0% found none, and half were below 9.9 mg/L.
Of the 52 fluoride tests on record for Bradford County (2017–2025),
0% found none, and half were below 332 µg/L.
Of the 52 iron tests on record for Bradford County (2017–2025),
0% found none, and half were below 168 µg/L.
Of the 52 lead tests on record for Bradford County (2017–2025),
0% found none, and half were below 0.2 µg/L.
Of the 52 manganese tests on record for Bradford County (2017–2025),
0% found none, and half were below 5.24 µg/L.
Of the 20 nitrate tests on record for Bradford County (1990),
5% found none, and half were below 3.85 mg/L.
Of the 72 sulfate tests on record for Bradford County (1990–2025),
0% found none, and half were below 3.55 mg/L.
Data Coverage & Gaps
Well-sampled analytes (15+ samples)
Iron 52 samples
Nitrate 20 samples
Arsenic 52 samples
Chloride 71 samples
Fluoride 52 samples
Nitrite 20 samples
Lead 52 samples
Manganese 52 samples
Sulfate 72 samples
Sodium 52 samples
pH 71 samples
Limited data (<15 samples) — interpret with caution
Total Coliform 9 samples
E. coli 5 samples
Fecal Coliform 4 samples
No private-well PFAS data for Bradford County
We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Bradford 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 Bradford County
24Active public water systems
16,504Residents on public water
73%Households on private wells
Public water systems in Bradford 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 Bradford 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 Bradford 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 Bradford County. Census data explorer →
USGS Aquifer Atlas — principal aquifer type underlying Bradford 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 Bradford County, used in contamination risk scoring. TRI Explorer →
EPA Superfund NPL — National Priorities List sites in or near Bradford 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 FL with at least one sample for that analyte.