Public water system record
Red Mesa NTUA
On record as serving San Juan County, UT · Serves 1,023 people
Federal records show 5 health-based violations and 9 monitoring/reporting issues for Red Mesa NTUA in the last ten years. The most serious issue in this window was a resolved Arsenic violation.
System profile
- Health-based violations, last 10 years
- 5
- Resolved
- 5
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 9
Key facts
- Red Mesa NTUA draws water from 1 well.
- Highest measured level in the last 10 years: Arsenic, 0.01323 mg/L, federal limit 0.01 mg/L (1.3 times the limit), 2024.
- Record on file since 2004, with 8 health-based violations before October 19, 2016.
Check whether Red Mesa NTUA 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 |
|---|---|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.01163 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Jul 1, 2024 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.01305 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
330 | Apr 1, 2024 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.01323 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
330 | Jan 1, 2024 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0126 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
330 | Oct 1, 2023 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0106 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Jan 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Jul 1, 2024 | Active |
|
Public Notice
OTHER
|
Apr 1, 2024 | Active |
|
Public Notice
OTHER
|
Jan 1, 2024 | Active |
|
Public Notice
OTHER
|
Oct 1, 2023 | Active |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Public Notice
OTHER
|
Jan 1, 2017 | 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 Red Mesa NTUA go back to 2004. Before October 19, 2016 they list 8 health-based violations (8 resolved) and 35 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 26 |
| 2010 to October 18, 2016 | 8 | 9 |
| October 19, 2016 to 2019 | 1 | 2 |
| 2020s | 4 | 5 |
Most recent health-based violation before October 19, 2016: Arsenic, began October 2015, Resolved.
Show all 8 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.0105 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
Oct 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0109 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0122 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Apr 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01256 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Jan 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01329 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Oct 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01523 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
|
Jul 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01568 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
Apr 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01445 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
Jan 1, 2013 | Resolved |
What the violations mean
Arsenic
5 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Red Mesa NTUA draws water from 1 well. It also buys water from Sweetwater NTUA. 2 other community water systems buy water from Red Mesa NTUA.
Buys water from
- Sweetwater NTUA Ft Defiance, AZ
Community systems that buy water from it
- Mexican Water NTUA Ft Defiance, AZ
- Todahaidekani NTUA Ft Defiance, AZ
Annual water quality report
Red Mesa NTUA 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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