Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
15
health-based violations
112
violations on file
2
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2004-09-01 → 2004-09-30 |
| MCL | Health-based | Resolved | 2004-09-01 → 2004-09-30 |
| MCL | Health-based | Resolved | 2004-09-01 → 2004-09-30 |
| MCL | Health-based | Resolved | 2004-09-01 → 2004-09-30 |
| MCL | Health-based | Resolved | 2004-09-01 → 2004-09-30 |
| MCL | Health-based | Resolved | 2002-02-01 → 2002-02-28 |
| MCL | Health-based | Resolved | 2002-02-01 → 2002-02-28 |
| MCL | Health-based | Resolved | 2000-06-01 → 2000-06-30 |
| MCL | Health-based | Archived | 1999-05-01 → 1999-05-31 |
| MCL | Health-based | Resolved | 1996-05-01 → 1996-05-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHXS | 0.0052 µg/L | 2/27 | 2025 |
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 300.65 µg/L 23% of the EPA limit 1300 µg/L
worst single sample: 2790 µg/L | 238/242 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 596 µg/L 6% of the EPA limit 10000 µg/L
worst single sample: 1310 µg/L | 78/90 | SYR4 | 2012–2019 |
| Fluoride | 201.5 µg/L 5% of the EPA limit 4000 µg/L
worst single sample: 950 µg/L | 58/98 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 6.842 pCi/L 46% of the EPA limit 15 pCi/L
worst single sample: 8 pCi/L | 55/56 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 5.8145 pCi/L No EPA limit set
worst single sample: 8.45 pCi/L | 52/56 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 3.616 pCi/L 72% of the EPA limit 5 pCi/L
worst single sample: 4.03 pCi/L | 49/56 | SYR4 | 2012–2019 |
| Barium | 598.2 µg/L 30% of the EPA limit 2000 µg/L
worst single sample: 640 µg/L | 45/45 | SYR4 | 2012–2019 |
| Nitrate | 733.8 µg/L 7.3% of the EPA limit 10000 µg/L
worst single sample: 857 µg/L | 32/44 | SYR4 | 2018–2019 |
| Lithium | 25.8 µg/L No EPA limit set | 27/27 | UCMR-5 | 2025 |
| Combined Uranium | 5.0765 µg/L 17% of the EPA limit 30 µg/L
worst single sample: 5.2 µg/L | 20/56 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 16/16 | LCR | 2025 |
| Lead | 29.4 µg/L 196% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 43.5 µg/L | 16/242 | SYR4 | 2012–2019 |
| Chromium | 20.8 µg/L 21% of the EPA limit 100 µg/L
worst single sample: 26 µg/L | 14/45 | SYR4 | 2012–2019 |
| TTHM | 9.375 µg/L 12% of the EPA limit 80 µg/L
worst single sample: 10.5 µg/L | 10/43 | SYR4 | 2012–2019 |
| Bromodichloromethane | 3.12 µg/L No EPA limit set
worst single sample: 4 µg/L | 9/65 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.62 µg/L No EPA limit set
worst single sample: 2.7 µg/L | 9/65 | SYR4 | 2012–2019 |
| Bromoform | 1.77 µg/L No EPA limit set
worst single sample: 1.8 µg/L | 7/65 | SYR4 | 2012–2019 |
| Chloroform | 4.736 µg/L No EPA limit set
worst single sample: 4.97 µg/L | 5/65 | SYR4 | 2012–2019 |
| Nitrite | 4.8 µg/L 0.5% of the EPA limit 1000 µg/L
worst single sample: 5 µg/L | 3/11 | SYR4 | 2019 |
| Trichloroethylene | 0.9000 µg/L 18% of the EPA limit 5 µg/L | 3/89 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 2.3695 µg/L 39% of the EPA limit 6 µg/L
worst single sample: 2.37 µg/L | 2/66 | SYR4 | 2018–2019 |
| Dichloroacetic Acid | 1.7705 µg/L No EPA limit set
worst single sample: 1.79 µg/L | 2/31 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 1.7705 µg/L 3% of the EPA limit 60 µg/L
worst single sample: 1.79 µg/L | 2/43 | SYR4 | 2012–2019 |
| Arsenic | 2.1 µg/L 21% of the EPA limit 10 µg/L | 1/61 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 6.4 µg/L 128% of the EPA limit, at the 95th percentile of samples — 5 µg/L | 1/90 | SYR4 | 2012–2019 |
85 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Tinker Air Force Base
Is Tinker Air Force Base tap water safe to drink?
EPA monitoring detected 26 contaminants in Tinker Air Force Base's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Tinker Air Force Base's water?
EPA monitoring detected Copper, Nitrate-Nitrite, Fluoride, Gross Alpha, Excl. Radon And U, Gross Beta Particle Activity, and others. The full list with the level and data source for each is above.
How many people does Tinker Air Force Base serve?
Tinker Air Force Base reports serving 24,645 people in Oklahoma, per its EPA record.
Has Tinker Air Force Base had any water quality violations?
The EPA has 112 violations on file for Tinker Air Force Base, of which 15 are health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.