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Tap water quality report

Dennehotso Boarding School Bia

EPA monitoring tested this supplier for 71 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
11
detected
300
people served
1
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Federal government

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.

1
health-based violations
90
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-10-01 → 2010-12-31
Other Monitoring Resolved 2024-07-01
RPT Monitoring Resolved 2024-01-01
RPT Monitoring Resolved 2023-10-01
RPT Monitoring Resolved 2022-10-01
RPT Monitoring Resolved 2020-05-01
MR Monitoring Resolved 2016-08-01
MR Monitoring Resolved 2016-08-01
Other Monitoring Resolved 2016-04-01
Other Monitoring Resolved 2016-04-01

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
Nitrate
1900 µg/L 19%
of the EPA limit 10000 µg/L
 30/30 SYR4 2012–2019
Lead
0.0013 mg/L 8.7%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Fluoride
280 µg/L 7%
of the EPA limit 4000 µg/L
 6/6 SYR4 2012–2018
Arsenic
9.895 µg/L 99%
of the EPA limit 10 µg/L
worst single sample: 10 µg/L
4/15 SYR4 2012–2019
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 4/6 SYR4 2012–2018
Barium
20.9 µg/L 1%
of the EPA limit 2000 µg/L
worst single sample: 21 µg/L
3/6 SYR4 2012–2018
Combined Uranium
6.199 µg/L 21%
of the EPA limit 30 µg/L
worst single sample: 6.3 µg/L
3/4 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
2.4095 pCi/L 16%
of the EPA limit 15 pCi/L
worst single sample: 2.51 pCi/L
2/4 SYR4 2012–2018
TTHM
4.6125 µg/L 5.8%
of the EPA limit 80 µg/L
worst single sample: 4.62 µg/L
2/4 SYR4 2012–2019
Combined Radium (-226 And -228)
0.8550 pCi/L 17%
of the EPA limit 5 pCi/L
 1/4 SYR4 2012–2018
Nitrite
230 µg/L 23%
of the EPA limit 1000 µg/L
 1/13 SYR4 2012–2019
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Shawn J Walbecq
Phone
9286583204
Email
Shawn.Walbecq@bie.edu

Frequently asked questions about Dennehotso Boarding School Bia

Is Dennehotso Boarding School Bia tap water safe to drink?

EPA monitoring detected 11 contaminants in Dennehotso Boarding School Bia'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 Dennehotso Boarding School Bia's water?

EPA monitoring detected Nitrate, Lead, Fluoride, Arsenic, Selenium, and others. The full list with the level and data source for each is above.

How many people does Dennehotso Boarding School Bia serve?

Dennehotso Boarding School Bia reports serving 300 people in Arizona, per its EPA record.

Has Dennehotso Boarding School Bia had any water quality violations?

The EPA has 90 violations on file for Dennehotso Boarding School Bia, of which 1 is 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.