Public water system record
Mexican Water NTUA
On record as serving San Juan County, UT · Serves 294 people
Federal records show 9 health-based violations and 13 monitoring/reporting issues for Mexican Water 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
- 9
- Resolved
- 9
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 13
Key facts
- Mexican Water NTUA buys its water from Red Mesa NTUA.
- Highest measured level in the last 10 years: Arsenic, 0.0143 mg/L, federal limit 0.01 mg/L (1.4 times the limit), 2022.
- Record on file since 2008, with 8 health-based violations before October 19, 2016.
Check whether Mexican Water 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 0.01128 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Apr 1, 2024 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.01193 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Jan 1, 2024 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0117 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Oct 1, 2023 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Jul 1, 2023 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0118 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Jul 1, 2022 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0143 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
330 | Apr 1, 2022 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0114 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Jan 1, 2022 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0114 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Oct 1, 2021 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0109 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Jul 1, 2019 | 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
|
Apr 1, 2024 | Active |
|
Public Notice
OTHER
|
Jan 1, 2024 | Active |
|
Public Notice
OTHER
|
Oct 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Jul 1, 2022 | Active |
|
Public Notice
OTHER
|
Apr 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Jan 1, 2022 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jun 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Jul 1, 2019 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2019 | 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 2008
EPA's records for Mexican Water NTUA go back to 2008. Before October 19, 2016 they list 8 health-based violations (8 resolved) and 32 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 1 |
| 2010 to October 18, 2016 | 8 | 31 |
| October 19, 2016 to 2019 | 1 | 2 |
| 2020s | 8 | 9 |
Most recent health-based violation before October 19, 2016: Arsenic, began July 2016, Resolved.
Show all 8 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.0108 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
Jul 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0133 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Apr 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0133 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Jan 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Oct 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0103 mg/L, federal limit 0.01 mg/L (at or just above the limit)
|
Apr 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01238 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jul 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01238 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Apr 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0116 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jan 1, 2013 | Resolved |
What the violations mean
Arsenic
9 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Mexican Water NTUA buys its water from Red Mesa NTUA. It lists no wells or intakes of its own.
Buys water from
- Red Mesa NTUA Ft Defiance, AZ
Annual water quality report
Mexican Water 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.
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 Mexican Water NTUA 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