Public water system record
Sipaulovi (Lower Sipaulovi/Lower Mishongnovi)
Serves Second Mesa, Navajo County, AZ · 609 people served
Federal records show 26 health-based violations and 13 monitoring/reporting issues for Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
Source water
Purchased groundwater
ZIP
86043
EPA system ID
090400107
- Health-based violations, last 10 years
- 26
- Resolved
- 25
- Unresolved
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 13
Key facts
- Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) buys its water from Huc Regional Water System.
- Highest measured level in the last 10 years: Arsenic, 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit), 2020.
- Most recent formal enforcement: compliance order (no penalty) by EPA, October 2018.
- Record on file since 1991, with 38 health-based violations before October 19, 2016.
Check whether Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) 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 |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Dec 31, 2023 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
330 | Jul 1, 2022 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Apr 1, 2022 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0123 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Jan 1, 2022 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0127 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
330 | Oct 1, 2021 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0131 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
330 | Jul 1, 2021 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0174 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Apr 1, 2021 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0166 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jan 1, 2021 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0153 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
|
330 | Oct 1, 2020 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0173 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jul 1, 2020 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
330 | Apr 1, 2020 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
330 | Jan 1, 2020 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0177 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
330 | Oct 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0174 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jul 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0174 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Apr 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0171 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jan 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0172 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Oct 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0167 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jul 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0165 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Apr 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0163 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
330 | Jan 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0159 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
330 | Oct 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0165 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jul 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0166 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Apr 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0171 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jan 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0174 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Oct 1, 2016 | 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, 2025 | Active |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2025 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Public Notice
OTHER
|
Apr 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Apr 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Public Notice
OTHER
|
Mar 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Oct 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Jul 1, 2016 | Resolved |
|
Public Notice
OTHER
|
Apr 1, 2016 | Resolved |
|
Public Notice
OTHER
|
Jan 1, 2016 | Resolved |
|
Public Notice
OTHER
|
Oct 1, 2015 | Resolved |
Full record since 1991
EPA's records for Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) go back to 1991. Before October 19, 2016 they list 38 health-based violations (38 resolved) and 220 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 56 |
| 2000s | 10 | 80 |
| 2010 to October 18, 2016 | 28 | 84 |
| October 19, 2016 to 2019 | 12 | 0 |
| 2020s | 13 | 9 |
Most recent health-based violation before October 19, 2016: Arsenic, began October 2016, Resolved.
Show all 38 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.0174 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Oct 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0172 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jul 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0178 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Apr 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0178 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0178 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Oct 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0178 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jul 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0178 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Apr 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0174 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jan 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0176 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Oct 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0182 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jul 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0193 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Apr 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0193 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Jan 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01837 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Oct 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01837 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jul 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01837 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Apr 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01927 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Jan 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01935 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Oct 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02255 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Jul 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02255 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Apr 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02037 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jan 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02037 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Oct 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01875 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Jul 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01883 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Apr 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01883 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Jan 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01883 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Oct 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01865 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Jul 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01865 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Apr 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01838 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01838 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Oct 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01877 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Jul 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01955 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Apr 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01955 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jan 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01833 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Oct 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01833 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jul 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01767 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Apr 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01767 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Oct 1, 2007 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Apr 1, 2007 | Resolved |
Enforcement actions
EPA took 2 formal enforcement actions against Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) between 2011 and 2018, filed as 48 records in EPA's data. The most recent was a compliance order (no penalty) in October 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 3, 2018 | EPA | Compliance order (no penalty) | 29 violations (29 health-based): Arsenic |
| Jan 26, 2011 | EPA | Signed compliance agreement | 20 violations (20 health-based): Arsenic |
What the violations mean
Arsenic
24 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Groundwater Rule
1 incidentThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) buys its water from Huc Regional Water System. It lists no wells or intakes of its own.
Buys water from
- Huc Regional Water System Flagstaff, AZ
Annual water quality report
Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) 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