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.
9
health-based violations
18
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2024-10-17 |
| TT | Health-based | Resolved | 2024-10-17 |
| TT | Health-based | Resolved | 2002-10-01 → 2002-12-31 |
| TT | Health-based | Resolved | 2002-10-01 → 2002-12-31 |
| TT | Health-based | Resolved | 1995-01-01 → 1995-01-31 |
| TT | Health-based | Resolved | 1994-06-01 → 1994-06-30 |
| TT | Health-based | Archived | 1993-12-01 → 1993-12-31 |
| MCL | Health-based | Resolved | 1990-04-01 → 1990-06-30 |
| MCL | Health-based | Resolved | 1990-01-01 → 1990-03-31 |
| RPT | Monitoring | Resolved | 2024-10-17 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
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 |
|---|---|---|---|---|
| Nitrate-Nitrite | 2782.5 µg/L 28% of the EPA limit 10000 µg/L
worst single sample: 9110 µg/L | 146/146 | SYR4 | 2012–2019 |
| TTHM | 91.15 µg/L 114% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 123 µg/L | 111/128 | SYR4 | 2012–2019 |
| Dibromochloromethane | 24.985 µg/L No EPA limit set
worst single sample: 37.7 µg/L | 110/153 | SYR4 | 2012–2019 |
| Bromodichloromethane | 23.67 µg/L No EPA limit set
worst single sample: 38.2 µg/L | 107/153 | SYR4 | 2012–2019 |
| Bromoform | 11.825 µg/L No EPA limit set
worst single sample: 35.4 µg/L | 106/152 | SYR4 | 2012–2019 |
| Chloroform | 29.87 µg/L No EPA limit set
worst single sample: 61.6 µg/L | 104/149 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 21.41 µg/L 36% of the EPA limit 60 µg/L
worst single sample: 41.6 µg/L | 98/128 | SYR4 | 2012–2019 |
| Copper | 423.5 µg/L 33% of the EPA limit 1300 µg/L
worst single sample: 754.8 µg/L | 91/91 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 6.094 µg/L No EPA limit set
worst single sample: 7.78 µg/L | 89/116 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 12.96 µg/L No EPA limit set
worst single sample: 22 µg/L | 75/116 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 10.822 µg/L No EPA limit set
worst single sample: 16.5 µg/L | 47/116 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 2 µg/L 40% of the EPA limit 5 µg/L
worst single sample: 2.1 µg/L | 30/58 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.494 µg/L No EPA limit set
worst single sample: 1.53 µg/L | 19/116 | SYR4 | 2012–2019 |
| Barium | 657.05 µg/L 33% of the EPA limit 2000 µg/L
worst single sample: 731 µg/L | 18/18 | SYR4 | 2012–2015 |
| Lithium | 28.5 µg/L No EPA limit set | 17/20 | UCMR-5 | 2024 |
| Gross Alpha, Excl. Radon And U | 6.27 pCi/L 42% of the EPA limit 15 pCi/L
worst single sample: 6.9 pCi/L | 15/19 | SYR4 | 2012–2019 |
| Lead | 0.0016 mg/L 11% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2025 |
| Combined Uranium | 1.745 µg/L 5.8% of the EPA limit 30 µg/L
worst single sample: 1.8 µg/L | 12/19 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 2.5 pCi/L 50% of the EPA limit 5 pCi/L
worst single sample: 2.75 pCi/L | 11/19 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 7.7415 pCi/L No EPA limit set
worst single sample: 8.539 pCi/L | 11/19 | SYR4 | 2012–2019 |
| Dichloromethane | 1.34 µg/L 27% of the EPA limit 5 µg/L
worst single sample: 1.4 µg/L | 7/59 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 20 µg/L 333% of the EPA limit, at the 95th percentile of samples — 6 µg/L
worst single sample: 23 µg/L | 6/56 | SYR4 | 2018–2019 |
| Arsenic | 3.88 µg/L 39% of the EPA limit 10 µg/L
worst single sample: 4.1 µg/L | 5/24 | SYR4 | 2012–2018 |
| Chromium | 8.485 µg/L 8.5% of the EPA limit 100 µg/L
worst single sample: 8.8 µg/L | 4/18 | SYR4 | 2012–2015 |
| Lead | 20.005 µg/L 133% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 21.7 µg/L | 4/91 | SYR4 | 2013–2019 |
| Fluoride | 638 µg/L 16% of the EPA limit 4000 µg/L
worst single sample: 640 µg/L | 2/19 | SYR4 | 2012–2016 |
| Monochloroacetic Acid | 8.0235 µg/L No EPA limit set
worst single sample: 8.25 µg/L | 2/116 | SYR4 | 2012–2019 |
80 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Del City
Is Del City tap water safe to drink?
EPA monitoring detected 30 contaminants in Del City'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 Del City's water?
EPA monitoring detected Nitrate-Nitrite, TTHM, Dibromochloromethane, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.
How many people does Del City serve?
Del City reports serving 22,128 people in Oklahoma, per its EPA record.
Has Del City had any water quality violations?
The EPA has 18 violations on file for Del City, of which 9 are health-based (a contaminant limit or required treatment was breached) and 0 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.