Public water system record
Navajo Mountain Community Boarding School BIA
On record as serving Navajo Mountain, San Juan County, UT · Serves 163 people
Federal records show 2 health-based violations and 20 monitoring/reporting issues for Navajo Mountain Community Boarding School BIA in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 20
Key facts
- Navajo Mountain Community Boarding School BIA buys its water from Inscription House-Navajo Mountain NTUA.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.0902 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2018.
- Record on file since 2004, with 0 health-based violations before October 19, 2016.
Check whether Navajo Mountain Community Boarding School BIA serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0902 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0902 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2024 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Oct 1, 2023 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Oct 1, 2022 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Dec 1, 2020 | Resolved |
|
Revised Total Coliform Rule
RPT
|
May 1, 2020 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Jan 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Oct 1, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2016 | Resolved |
|
Revised Total Coliform Rule
OTHER
|
Apr 1, 2016 | Resolved |
|
Stage 2 Disinfection Byproducts Rule
Monitoring and reporting
|
Oct 1, 2013 | Resolved |
Full record since 2004
EPA's records for Navajo Mountain Community Boarding School BIA go back to 2004. Before October 19, 2016 they list no health-based violations and 10 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 3 |
| 2010 to October 18, 2016 | 0 | 7 |
| October 19, 2016 to 2019 | 2 | 7 |
| 2020s | 0 | 10 |
What the violations mean
Total Trihalomethanes (TTHMs)
2 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Navajo Mountain Community Boarding School BIA buys its water from Inscription House-Navajo Mountain NTUA. It lists no wells or intakes of its own.
Buys water from
- Inscription House-Navajo Mountain NTUA Ft Defiance, AZ
Annual water quality report
Navajo Mountain Community Boarding School BIA must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Navajo Mountain Community Boarding School BIA for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by EPA Region 9.
Certified drinking water labs by state EPA guidance for private wells