Public water system record
Maricopa Mountain DWID 1
Serves an area of Pinal County, AZ that includes Stanfield · 450 people served
Federal records show 31 health-based violations and 19 monitoring/reporting issues for Maricopa Mountain DWID 1 in the last ten years. The most serious issue in this window was a Nitrate violation that EPA lists as archived, not resolved.
System profile
Source water
Groundwater
ZIP
85139
EPA system ID
AZ0411087
- Health-based violations, last 10 years
- 31
- Resolved
- 4
- Unresolved
- 0
- Archived by EPA
- 27
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 19
Key facts
- Maricopa Mountain DWID 1 draws water from 2 wells.
- Highest measured level in the last 10 years: Nitrate, 23 mg/L, federal limit 10 mg/L (2.3 times the limit), 2025.
- Most recent formal enforcement: compliance order (no penalty) by Arizona, October 2019.
- Record on file since 1985, with 37 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 3 service lines.
Check whether Maricopa Mountain DWID 1 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 |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 22 mg/L, federal limit 10 mg/L (2.2 times the limit)
|
330 | Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 21 mg/L, federal limit 10 mg/L (2.1 times the limit)
|
330 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 23 mg/L, federal limit 10 mg/L (2.3 times the limit)
|
330 | Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 16 mg/L, federal limit 10 mg/L (1.6 times the limit)
|
330 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 17 mg/L, federal limit 10 mg/L (1.7 times the limit)
|
330 | Oct 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 19 mg/L, federal limit 10 mg/L (1.9 times the limit)
|
330 | Jul 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 16 mg/L, federal limit 10 mg/L (1.6 times the limit)
|
330 | Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
330 | Oct 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12.4 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jul 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Apr 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Oct 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 14.8 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
330 | Jul 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 17 mg/L, federal limit 10 mg/L (1.7 times the limit)
|
330 | Apr 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
330 | Jan 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
330 | Oct 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Arsenic
Contaminant limit exceeded
Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Jul 1, 2021 | Resolved | No |
|
Nitrate
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
330 | Jul 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Arsenic
Contaminant limit exceeded
Measured 0.014 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
330 | Apr 1, 2021 | Resolved | No |
|
Nitrate
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
|
330 | Apr 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Arsenic
Contaminant limit exceeded
Measured 0.014 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
330 | Jan 1, 2021 | Resolved | No |
|
Nitrate
Contaminant limit exceeded
Measured 16 mg/L, federal limit 10 mg/L (1.6 times the limit)
|
330 | Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Arsenic
Contaminant limit exceeded
Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Oct 1, 2020 | Resolved | No |
|
Nitrate
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
330 | Oct 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
330 | Jul 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 17 mg/L, federal limit 10 mg/L (1.7 times the limit)
|
330 | Apr 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
330 | Jan 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Oct 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jul 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
330 | Apr 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Sep 27, 2025 | Resolved |
|
Public Notice
OTHER
|
Apr 1, 2025 | Resolved |
|
Public Notice
OTHER
|
Jul 24, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Apr 16, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
Full record since 1985
EPA's records for Maricopa Mountain DWID 1 go back to 1985. Before October 19, 2016 they list 37 health-based violations (37 resolved) and 131 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 15 |
| 1990s | 0 | 29 |
| 2000s | 8 | 50 |
| 2010 to October 18, 2016 | 29 | 37 |
| October 19, 2016 to 2019 | 3 | 3 |
| 2020s | 28 | 5 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began April 2016, Resolved.
Show all 37 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Apr 1, 2016 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jan 1, 2016 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Jul 1, 2015 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 17 mg/L, federal limit 10 mg/L (1.7 times the limit)
|
Jan 1, 2015 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
|
Oct 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Jul 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 17 mg/L, federal limit 10 mg/L (1.7 times the limit)
|
Apr 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 18 mg/L, federal limit 10 mg/L (1.8 times the limit)
|
Jan 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jul 1, 2013 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 16 mg/L, federal limit 10 mg/L (1.6 times the limit)
|
Apr 1, 2013 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 17 mg/L, federal limit 10 mg/L (1.7 times the limit)
|
Jan 1, 2013 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Oct 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jul 1, 2012 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jul 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.015 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
|
Apr 1, 2012 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Apr 1, 2012 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Jan 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
Jan 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
Oct 1, 2011 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jul 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
Jul 1, 2011 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
|
Apr 1, 2011 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
Jan 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.014 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
Jan 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Oct 1, 2010 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
Oct 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jul 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Apr 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Oct 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jul 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Apr 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jan 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Oct 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jul 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Oct 1, 2007 | Resolved |
|
Di(2-ethylhexyl) phthalate
Contaminant limit exceeded
Measured 0.0072 mg/L, federal limit 0.006 mg/L (1.2 times the limit)
|
Jan 1, 2000 | Resolved |
Enforcement actions
Arizona regulators took 5 formal enforcement actions against Maricopa Mountain DWID 1 between 2010 and 2019. The most recent was a compliance order (no penalty) in October 2019.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 25, 2019 | Arizona | Compliance order (no penalty) | 44 violations (44 health-based): Nitrate |
| Jan 9, 2017 | Arizona | Compliance order (no penalty) | 17 violations (16 health-based): Nitrate |
| Oct 4, 2013 | Arizona | Compliance order (no penalty) | 9 violations (9 health-based): Nitrate |
| Jun 7, 2010 | Arizona | Compliance order (no penalty) | 34 violations (27 health-based): Arsenic, Nitrate |
| Feb 26, 2010 | Arizona | Compliance order (no penalty) | 11 violations (10 health-based): Arsenic |
What the violations mean
Nitrate
27 incidentsNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Arsenic
4 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Maricopa Mountain DWID 1 draws water from 2 wells. 1 other community water system buys water from Maricopa Mountain DWID 1.
Community systems that buy water from it
- American Realty Mortgage Company Maricopa, AZ
Annual water quality report
Maricopa Mountain DWID 1 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 Maricopa Mountain DWID 1 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 Arizona.
Certified drinking water labs by state EPA guidance for private wells