Wright-patterson Afb Area A

Who runs it

EPA's record says Wright-patterson Afb Area A has 479 service connections and serves 16,551 people.

EPA classes it as a community water system, one that serves the same residents all year.

EPA's record says it has substantially implemented source water protection under Ohio's program, dating the program from 2023.

Source: EPA Safe Drinking Water Information System (SDWIS), water system record.

How the water is treated

EPA's treatment table registers these steps for Wright-patterson Afb Area A: aeration, corrosion control, chlorine disinfection, fluoridation, granular activated carbon, ion-exchange softening, and lime softening.

The list is what each system registered with EPA for treatment plants EPA still shows as active, and it can lag a plant upgrade.

Source: EPA Safe Drinking Water Information System (SDWIS) treatment table (EPA Envirofacts, pulled September 2026).

Violations

EPA's record shows no health-based violations for Wright-patterson Afb Area A since 2015.

EPA logs no violations of any kind for Wright-patterson Afb Area A since 2020.

Source: EPA Safe Drinking Water Information System (SDWIS) violation records: health-based violations with compliance periods beginning in 2015 or later, all violations from 2020 or later (EPA Envirofacts, pulled September 2026).

Lead and copper at the tap

In the sampling period ending June 2025, the 90th-percentile lead result at Wright-patterson Afb Area A was 2.1 ppb, under both the current 15 ppb action level and the 10 ppb level that applies from 2027.

The highest result on file is 12 ppb, in the period ending December 2022.

EPA has 9 sampling periods on file for Wright-patterson Afb Area A since 2016, the first ending in 2017; 1 of the 9 periods went above 10 ppb.

Every water system has to inventory its service lines, the pipes from the main to each building. In the inventory Wright-patterson Afb Area A sent EPA, 575 lines are counted.

Systems sample taps in the homes most likely to have lead pipes or solder. The 90th-percentile result is the level nine in ten of the sampled homes were at or below. Lead comes mostly from service lines and house plumbing, not the source water, so a low result for the system does not clear an old house.

EPA's dashboard status for this inventory: reported all required service line types.

Source: EPA Safe Drinking Water Information System (SDWIS) lead and copper 90th-percentile results (EPA Envirofacts), sampling periods ending 2016 or later; EPA's service line inventory dashboard, Ohio's 2026 Q2 submission.

PFAS

EPA's fifth national round of testing (UCMR 5) took 13 samples of the water entering the pipes of Wright-patterson Afb Area A in 2024 and measured 29 PFAS.

The highest PFOA or PFOS result, 5 ng/L, is at or above the federal limit of 4 ng/L that EPA set in 2024. Systems have until 2029 to comply, and in May 2026 EPA proposed letting systems apply for two more years. One sample over the limit is not a violation: compliance is judged on a running annual average.

The highest PFAS results were PFHxA 25 ng/L, PFPeA 23 ng/L, and PFHxS 13 ng/L.

The highest PFOA or PFOS result was measured at Treatment Plant 172 (STU 2)(Wells 1-3 & 7).

The hazard index for the PFHxS, PFNA, GenX and PFBS mixture reached 1.3 in the worst sample; above 1 would exceed the 2024 mixture limit, which EPA proposed in May 2026 to withdraw.

The system reported PFAS treatment: granular activated carbon.

The system reported potential PFAS sources near its supply.

Ohio EPA's own statewide sampling tested 4 plants of Wright-patterson Afb Area A (latest sample May 2021). The highest result was PFHxS at 31.5 ppt (ppt is the same unit as ng/L), against Ohio's action level of 140 ppt. The highest PFOA or PFOS result was PFOS at 5.8 ppt, against 70 ppt. Those action levels are the ones Ohio EPA used for the survey; the 2024 federal limit for PFOA and PFOS is 4 ng/L.

Ohio EPA's current sampling status map lists 4 plants of Wright-patterson Afb Area A as sampled, most recently August 2026.

PFAS are the 'forever chemicals' from firefighting foam, plating shops and non-stick coatings. Results are for water leaving the plant, not your tap.

Source: EPA UCMR 5 occurrence data (final release, August 2026); Ohio EPA statewide PFAS sampling, 2019 to 2021, and its sampling status map.

Disinfection byproducts

Chlorine that disinfects water also reacts with organic matter to form byproducts. Two groups have federal limits: total trihalomethanes (TTHM, 80 µg/L) and five haloacetic acids (HAA5, 60 µg/L), judged on running yearly averages at each sampling site.

For TTHM, the average of Wright-patterson Afb Area A's samples in 2019, the last year it was sampled, was 12.9 µg/L. The worst yearly average was 17 µg/L and the highest single sample was 65.3 µg/L, from 38 samples taken from 2012 to 2019.

For HAA5, the average in the last year sampled was 0.7 µg/L. The worst yearly average was 3.8 µg/L and the highest single sample was 9.3 µg/L, from 38 samples.

A yearly average of 0 means nothing was detected in that year's samples. EPA's file stops at 2019; Ohio EPA's Drinking Water Watch has newer results.

Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system samples (non-detects counted as zero).

Nitrate, arsenic and radioactivity

Nitrate: the highest of 31 samples was 2.65 mg/L (as nitrogen) in 2013; in 2019, the last year sampled, the highest was 2.5 mg/L. No sample was over the limit of 10 mg/L. Nitrate above 10 is unsafe for infants.

Arsenic was not detected in 8 samples (limit 10 µg/L).

Measured in finished water: at the plant's entry points and in the distribution system; raw well and intake samples are left out. Non-detects count as zero.

Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.

Solvents and fuels

EPA's file holds results for all six solvent and fuel compounds it checked. tetrachloroethylene (PCE) was detected in 1 of 74 samples, highest 1.1 µg/L (limit 5). Benzene, carbon tetrachloride, 1,2-dichloroethane, trichloroethylene, and vinyl chloride were not detected in 74 samples each.

"Not detected" means the lab's result was below what its method can measure, not that the compound is absent. Non-detects count as zero in the highest-result column.

Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.

Farm chemicals and metals

EPA's file holds results for 8 of the nine herbicides and metals it checked. Detected: barium in 8 of 8 samples, highest 177 µg/L (limit 2,000). Not detected: atrazine in 12 samples, alachlor in 12 samples, chromium in 8 samples, cadmium in 8 samples, mercury in 8 samples, selenium in 8 samples, thallium in 8 samples.

Non-detects count as zero in the highest-result column.

Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.

Bacteria in the pipes

From 2012 to 2019, 7 of 1,249 routine total coliform samples taken in the distribution system at Wright-patterson Afb Area A tested positive (0.56%); in 2019, the last year on file, 1 of 180 did. E. coli was never found in the 1,122 samples tested for it.

A positive coliform test is a warning sign, not a violation by itself. E. coli is a sign that human or animal waste may have reached the water. Coliform counts are routine samples only; E. coli counts include repeat samples.

Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system presence/absence tests for total coliform and E. coli.

Fluoride

The Ohio Department of Health's report to the CDC (My Water's Fluoride) says Wright-patterson Afb Area A adjusts the fluoride level to the recommended level for preventing tooth decay.

EPA's treatment table lists fluoridation among the steps at Wright-patterson Afb Area A.

Measured fluoride: 0.95 mg/L on average at the plant's entry points in 2017 (in the range dentists aim for); samples ran from 0.93 to 1.12 mg/L across 8 samples in 2012 to 2019.

The recommended level for preventing tooth decay is 0.7 mg/L; the federal limit is 4 mg/L. The treatment list is what each system registered with EPA and can lag a plant upgrade.

Source: CDC My Water's Fluoride (fluoridation status as reported by the Ohio Department of Health, fetched September 2026); EPA Safe Drinking Water Information System (SDWIS) treatment table; EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, entry-point fluoride samples.

Lithium

Lithium was not detected in 8 UCMR 5 samples at Wright-patterson Afb Area A, last sampled in 2024 (the method reports from 9 µg/L).

Lithium is not regulated. EPA's draft health reference level is 10 µg/L, and it occurs naturally in deep groundwater, so well systems in the northwest run highest.

Source: EPA UCMR 5 occurrence data (final release, August 2026), samples from 2023 to 2025.

How well the service area is mapped

EPA estimated the service area of Wright-patterson Afb Area A with a computer model rather than drawing it from the utility's map, so its edges are approximate.

Counting the people who live in the ZIP codes it overlaps, this atlas estimates 326 residents are inside the boundary, 2% of the 16,551 people Wright-patterson Afb Area A reports serving. With so much of its territory outside the polygon, part of the system shows on the map as private wells.

The resident count is an estimate from 2020 Census ZIP-code populations, not a count of customers.

Source: EPA Service Area Boundaries; resident estimate by this atlas from ZIP-code overlap.