Full contaminant data, sample history, and sourcing for Lubbock County. For readers who want to go beyond the summary.
Contaminant Data — All Analytes
599 well testing events on record, covering
22 analytes.
Data spans 1965 to 2023.
Contaminant
Samples
Years
Detection Rate
Distribution LowModHigh
vs. Limit
vs. TX Avg
Chloride
198
1972–2016
100%
116% of limit
↑ 224% above
Sulfate
198
1972–2016
100%
112% of limit
↑ 293% above
Arsenic
117
1990–2021
91%
94% of limit
↑ 148% above
Radon
3
2001–2016
100%
11% of limit
↓ 69% below
Fluoride
585
1937–2021
100%
65% of limit
↑ 172% above
Iron
315
1960–2021
72%
10% of limit
↓ 94% below
Uranium
45
2001–2021
100%
45% of limit
↑ 192% above
Manganese
306
1972–2021
78%
0% of limit
↓ 100% below
Nitrate
215
1972–2016
100%
1% of limit
↓ 96% below
HFPO-DA (GenX)
municipal
19
2023–2024
0%
—
—
Lead
116
1990–2021
8%
12% of limit
↓ 30% below
Nitrite
9
2001–2016
22%
1% of limit
~ typical
PFHxS
municipal
19
2023–2024
0%
—
—
PFNA
municipal
19
2023–2024
0%
—
—
PFOA
municipal
19
2023–2024
0%
—
—
PFOS
municipal
19
2023–2024
0%
—
—
Total Coliform
1
2016
0%
—
—
Sodium
198
1972–2016
100%
—
↑ 109% above
pH
200
1972–2016
100%
—
~ typical
PFBS
municipal
19
2023–2024
0%
—
—
Hardness
198
1972–2016
100%
—
↑ 70% above
E. coli
1
2016
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 TX.
Compare your result with Lubbock County
Of the 117 arsenic tests on record for Lubbock County (1990–2021),
9% found none, and half were below 9 µg/L.
Of the 198 chloride tests on record for Lubbock County (1972–2016),
0% found none, and half were below 290 mg/L.
Of the 585 fluoride tests on record for Lubbock County (1937–2021),
0% found none, and half were below 2.6 mg/L.
Of the 315 iron tests on record for Lubbock County (1960–2021),
28% found none.
Of the 116 lead tests on record for Lubbock County (1990–2021),
92% found none.
Of the 306 manganese tests on record for Lubbock County (1972–2021),
22% found none.
Of the 215 nitrate tests on record for Lubbock County (1972–2016),
0% found none, and half were below 90 µg/L.
Of the 198 sulfate tests on record for Lubbock County (1972–2016),
0% found none, and half were below 280 mg/L.
Of the 45 uranium tests on record for Lubbock County (2001–2021),
0% found none, and half were below 13.6 µg/L.
Data Coverage & Gaps
Well-sampled analytes (15+ samples)
Chloride 198 samples
Sulfate 198 samples
Arsenic 117 samples
Fluoride 585 samples
Iron 315 samples
Uranium 45 samples
Manganese 306 samples
Nitrate 215 samples
Lead 116 samples
Sodium 198 samples
pH 200 samples
Hardness 198 samples
Limited data (<15 samples) — interpret with caution
Radon 3 samples
Nitrite 9 samples
Total Coliform 1 sample
E. coli 1 sample
No private-well PFAS data for Lubbock County
We have no private well sampling data for PFAS compounds (PFOA, PFOS, PFNA, and related chemicals) in Lubbock 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 Lubbock County
74Active public water systems
315,040Residents on public water
14%Households on private wells
Public water systems in Lubbock 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 Lubbock 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 Lubbock 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 Lubbock County. Census data explorer →
USGS Aquifer Atlas — principal aquifer type underlying Lubbock 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 Lubbock County, used in contamination risk scoring. TRI Explorer →
EPA Superfund NPL — National Priorities List sites in or near Lubbock 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 TX with at least one sample for that analyte.