Data & Methodology — Kent County

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

Contaminant Data — All Analytes

148 well testing events on record, covering 12 analytes. Data spans 1960 to 2025.

Contaminant Samples Years Detection Rate Distribution LowModHigh vs. Limit vs. TX Avg
Sulfate 32 1978–1980 100%
760% of limit ↑ 2564% above
Chloride 32 1978–1980 100%
74% of limit ↑ 107% above
Manganese 29 1964–2015 66%
80% of limit ↑ 24% above
Iron 30 1964–2015 67%
22% of limit ↓ 86% below
Fluoride 126 1947–2015 98%
17% of limit ↓ 28% below
Arsenic 18 1990–2015 61%
37% of limit ~ typical
Lead 18 1990–2015 22%
21% of limit ↑ 27% above
Nitrate 9 1990–2004 89%
20% of limit ~ typical
Uranium 2 2006–2015 100%
22% of limit ↑ 42% above
pH 13 1978–1979 100%
— ~ typical
Hardness 13 1978–1979 100%
— ↑ 749% above
Sodium 13 1978–1979 100%
— ↑ 27% above

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 TX.

Compare your result with Kent County

Of the 32 chloride tests on record for Kent County (1978–1980), 0% found none, and half were below 185 mg/L.

Of the 126 fluoride tests on record for Kent County (1947–2015), 2% found none, and half were below 675 µg/L.

Of the 30 iron tests on record for Kent County (1964–2015), 33% found none, and half were below 10 µg/L.

Of the 29 manganese tests on record for Kent County (1964–2015), 34% found none, and half were below 20 µg/L.

Of the 32 sulfate tests on record for Kent County (1978–1980), 0% found none, and half were below 1900 mg/L.

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Data Coverage & Gaps

Well-sampled analytes (15+ samples)

  • Sulfate 32 samples
  • Chloride 32 samples
  • Manganese 29 samples
  • Iron 30 samples
  • Fluoride 126 samples
  • Arsenic 18 samples
  • Lead 18 samples

Limited data (<15 samples) — interpret with caution

  • Nitrate 9 samples
  • Uranium 2 samples
  • pH 13 samples
  • Hardness 13 samples
  • Sodium 13 samples

No private-well PFAS data for Kent County

We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Kent 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 Kent County

3 Active public water systems
768 Residents on public water
21% Households on private wells

Public water systems in Kent 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.

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 TX with at least one sample for that analyte.

Last updated: 2026-08-04

Full methodology →