Full contaminant data, sample history, and sourcing for Suwannee County. For readers who want to go beyond the summary.
Contaminant Data — All Analytes
984 well testing events on record, covering
23 analytes.
Data spans 1954 to 2024.
Contaminant
Samples
Years
Detection Rate
Distribution LowModHigh
vs. Limit
vs. FL Avg
Nitrate
416
1979–2025
97%
23% of limit
↑ 610% above
Iron
262
1979–2025
83%
10% of limit
↓ 95% below
Uranium
18
1995–2015
83%
7% of limit
↑ 576% above
Radon
36
1995–2015
100%
7% of limit
↓ 75% below
Manganese
262
1979–2025
82%
4% of limit
↓ 85% below
Lead
222
1979–2025
86%
1% of limit
↓ 63% below
Arsenic
215
1979–2025
91%
5% of limit
↓ 62% below
Sulfate
499
1980–2025
100%
4% of limit
↓ 85% below
PFHxS
municipal
6
2024–2025
0%
—
—
PFOA
municipal
6
2024–2025
0%
—
—
PFNA
municipal
6
2024–2025
0%
—
—
PFOS
municipal
6
2024–2025
0%
—
—
Chloride
689
1979–2025
100%
2% of limit
↓ 95% below
Fluoride
433
1980–2025
93%
2% of limit
↓ 65% below
HFPO-DA (GenX)
municipal
6
2024–2025
0%
—
—
Nitrite
416
1979–2025
36%
2% of limit
↑ 60% above
pH
927
1979–2025
100%
—
~ typical
Sodium
450
1980–2025
100%
—
↓ 96% below
PFBS
municipal
6
2024–2025
0%
—
—
Fecal Coliform
72
1979–2021
76%
—
~ typical
E. coli
45
2002–2025
98%
—
~ typical
Total Coliform
117
1979–2025
99%
—
~ typical
Hardness
122
1980–2015
100%
—
↓ 21% 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 FL.
Compare your result with Suwannee County
Of the 215 arsenic tests on record for Suwannee County (1979–2025),
9% found none, and half were below 0.5 µg/L.
Of the 689 chloride tests on record for Suwannee County (1979–2025),
0% found none, and half were below 5.7 mg/L.
Of the 433 fluoride tests on record for Suwannee County (1980–2025),
7% found none, and half were below 100 µg/L.
Of the 262 iron tests on record for Suwannee County (1979–2025),
17% found none, and half were below 30 µg/L.
Of the 222 lead tests on record for Suwannee County (1979–2025),
14% found none, and half were below 0.135 µg/L.
Of the 262 manganese tests on record for Suwannee County (1979–2025),
18% found none, and half were below 1 µg/L.
Of the 416 nitrate tests on record for Suwannee County (1979–2025),
3% found none, and half were below 2.2 mg/L.
Of the 499 sulfate tests on record for Suwannee County (1980–2025),
0% found none, and half were below 10 mg/L.
Data Coverage & Gaps
Well-sampled analytes (15+ samples)
Nitrate 416 samples
Iron 262 samples
Uranium 18 samples
Radon 36 samples
Manganese 262 samples
Lead 222 samples
Arsenic 215 samples
Sulfate 499 samples
Chloride 689 samples
Fluoride 433 samples
Nitrite 416 samples
pH 927 samples
Sodium 450 samples
Fecal Coliform 72 samples
E. coli 45 samples
Total Coliform 117 samples
Hardness 122 samples
No private-well PFAS data for Suwannee County
We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Suwannee 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 Suwannee County
49Active public water systems
16,968Residents on public water
82%Households on private wells
Public water systems in Suwannee 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 Suwannee 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 Suwannee 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 Suwannee County. Census data explorer →
USGS Aquifer Atlas — principal aquifer type underlying Suwannee 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 Suwannee County, used in contamination risk scoring. TRI Explorer →
EPA Superfund NPL — National Priorities List sites in or near Suwannee 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.