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Tap water quality report

Quapaw Tribe

EPA monitoring tested this supplier for 50 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

50
contaminants tested
10
detected
55
people served
3
health-based violations
Oklahoma rankingsLead in OklahomaPFAS in Oklahoma
Water source
Ground water
Ownership
Local government
Counties served
Ottawa

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.

3
health-based violations
189
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 1998-06-01 → 1998-06-30
RPT Monitoring Resolved 2024-10-17
RPT Monitoring Resolved 2024-10-17
MR Monitoring Resolved 2024-10-01
MR Monitoring Resolved 2024-10-01
MR Monitoring Resolved 2024-10-01
MR Monitoring Resolved 2024-10-01
MR Monitoring Resolved 2024-08-01 → 2024-08-31

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
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2025
Copper
25.185 µg/L 1.9%
of the EPA limit 1300 µg/L
worst single sample: 25.5 µg/L
8/10 SYR4 2014–2017
Combined Radium (-226 And -228)
1.9505 pCi/L 39%
of the EPA limit 5 pCi/L
worst single sample: 2.03 pCi/L
4/4 SYR4 2013–2019
Barium
87.05 µg/L 4.4%
of the EPA limit 2000 µg/L
worst single sample: 87.2 µg/L
3/3 SYR4 2012–2018
Fluoride
298 µg/L 7.5%
of the EPA limit 4000 µg/L
worst single sample: 300 µg/L
2/3 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
4.2565 pCi/L 28%
of the EPA limit 15 pCi/L
worst single sample: 4.33 pCi/L
2/4 SYR4 2013–2019
Gross Beta Particle Activity
3.1765 pCi/L
No EPA limit set
worst single sample: 3.18 pCi/L
2/4 SYR4 2013–2019
Bromoform
2.6 µg/L
No EPA limit set
 1/6 SYR4 2014–2019
Dibromochloromethane
1.6 µg/L
No EPA limit set
 1/6 SYR4 2014–2019
TTHM
4.2 µg/L 5.3%
of the EPA limit 80 µg/L
 1/3 SYR4 2014–2019
40 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBenzeneBeryllium, TotalBromodichloromethaneChlorobenzeneCadmiumCarbon TetrachlorideChloroformChromiumCombined UraniumDichloromethaneDibromoacetic AcidDichloroacetic AcidEthylbenzeneLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitrate-NitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
QUAPAW TRIBE
Phone
918-238-3137
Email
[email protected]

Frequently asked questions about Quapaw Tribe

Is Quapaw Tribe tap water safe to drink?

EPA monitoring detected 10 contaminants in Quapaw Tribe'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 Quapaw Tribe's water?

EPA monitoring detected Lead, Copper, Combined Radium (-226 And -228), Barium, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Quapaw Tribe serve?

Quapaw Tribe reports serving 55 people in Oklahoma, per its EPA record.

Has Quapaw Tribe had any water quality violations?

The EPA has 189 violations on file for Quapaw Tribe, of which 3 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.