Tap WaterIndex

← Oklahoma

Tap water quality report

Tonkawa

EPA monitoring tested this supplier for 69 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

69
contaminants tested
18
detected
3,299
people served
17
health-based violations
Oklahoma rankingsLead in OklahomaPFAS in Oklahoma
Water source
Ground water
Ownership
Local government
Counties served
Kay

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.

17
health-based violations
113
violations on file
18
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MCL Health-based Resolved 2007-03-01 → 2007-03-31
MCL Health-based Resolved 2007-03-01 → 2007-03-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
206.75 µg/L 16%
of the EPA limit 1300 µg/L
worst single sample: 1270 µg/L
26/30 SYR4 2013–2019
Nitrate-Nitrite
978.5 µg/L 9.8%
of the EPA limit 10000 µg/L
worst single sample: 980 µg/L
24/24 SYR4 2012–2019
Bromoform
7.903 µg/L
No EPA limit set
worst single sample: 19.9 µg/L
19/20 SYR4 2013–2019
Lead
0.0064 mg/L 43%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2025
Dibromochloromethane
7.5275 µg/L
No EPA limit set
worst single sample: 9.56 µg/L
16/20 SYR4 2013–2019
Combined Uranium
11.86 µg/L 40%
of the EPA limit 30 µg/L
worst single sample: 12.1 µg/L
13/13 SYR4 2014–2017
Gross Beta Particle Activity
10.296 pCi/L
No EPA limit set
worst single sample: 11 pCi/L
12/13 SYR4 2014–2017
Combined Radium (-226 And -228)
1.836 pCi/L 37%
of the EPA limit 5 pCi/L
worst single sample: 2 pCi/L
9/13 SYR4 2014–2017
Bromodichloromethane
2.481 µg/L
No EPA limit set
worst single sample: 2.53 µg/L
8/20 SYR4 2013–2019
Dibromoacetic Acid
3.25 µg/L
No EPA limit set
 8/8 SYR4 2013–2019
TTHM
25.93 µg/L 32%
of the EPA limit 80 µg/L
worst single sample: 31.6 µg/L
8/8 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
3.406 µg/L 5.7%
of the EPA limit 60 µg/L
worst single sample: 3.49 µg/L
8/8 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
7.03 pCi/L 47%
of the EPA limit 15 pCi/L
worst single sample: 7.6 pCi/L
7/13 SYR4 2014–2017
Barium
98.3 µg/L 4.9%
of the EPA limit 2000 µg/L
worst single sample: 99 µg/L
3/3 SYR4 2014–2019
Fluoride
198 µg/L 5%
of the EPA limit 4000 µg/L
worst single sample: 200 µg/L
3/3 SYR4 2014–2019
Lead
11.41 µg/L 76%
of the EPA limit 15 µg/L
worst single sample: 11.6 µg/L
3/30 SYR4 2013–2019
Selenium
9.21 µg/L 18%
of the EPA limit 50 µg/L
worst single sample: 9.4 µg/L
3/3 SYR4 2014–2019
Dichloroacetic Acid
1.25 µg/L
No EPA limit set
 1/8 SYR4 2013–2019
51 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChloroformChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TONKAWA
Phone
580-628-2508
Email
[email protected]

Frequently asked questions about Tonkawa

Is Tonkawa tap water safe to drink?

EPA monitoring detected 18 contaminants in Tonkawa'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 Tonkawa's water?

EPA monitoring detected Copper, Nitrate-Nitrite, Bromoform, Lead, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Tonkawa serve?

Tonkawa reports serving 3,299 people in Oklahoma, per its EPA record.

Has Tonkawa had any water quality violations?

The EPA has 113 violations on file for Tonkawa, of which 17 are health-based (a contaminant limit or required treatment was breached) and 18 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.