Public water system record
Antelope Peak DWID
Serves an area of Pinal County, AZ that includes Stanfield · 150 people served
Federal records show 3 health-based violations and 40 monitoring/reporting issues for Antelope Peak DWID in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.
System profile
Source water
Groundwater
ZIP
85139
EPA system ID
AZ0411712
- Health-based violations, last 10 years
- 3
- Resolved
- 3
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 40
Key facts
- Antelope Peak DWID draws water from 2 wells.
- Highest measured level in the last 10 years: Combined Uranium, 37 µg/L, federal limit 30 µg/L (1.2 times the limit), 2022.
- Most recent formal enforcement: compliance order (no penalty) by Arizona, August 2011.
- Record on file since 1987, with 140 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 15 unknown out of 76 service lines.
Check whether Antelope Peak DWID 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 | Resolved | No |
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jan 1, 2024 | Resolved | Yes |
|
Combined Uranium
Contaminant limit exceeded
Measured 37 µg/L, federal limit 30 µg/L (1.2 times the limit)
|
340 | Jul 1, 2022 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
Public Notice
OTHER
|
Dec 20, 2024 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jul 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Apr 27, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Aug 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Public Notice
OTHER
|
May 26, 2022 | Resolved |
|
Public Notice
OTHER
|
May 26, 2022 | Resolved |
|
Public Notice
OTHER
|
May 26, 2022 | Resolved |
|
Public Notice
OTHER
|
Mar 2, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Aug 1, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jul 1, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jun 1, 2021 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Aug 1, 2018 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jun 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jul 1, 2017 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jan 1, 2017 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Dec 1, 2016 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2016 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2016 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2016 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2015 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2002 | Active |
Full record since 1987
EPA's records for Antelope Peak DWID go back to 1987. Before October 19, 2016 they list 140 health-based violations (137 resolved, 3 archived by EPA without a recorded fix) and 346 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 27 |
| 1990s | 3 | 62 |
| 2000s | 26 | 79 |
| 2010 to October 18, 2016 | 111 | 178 |
| October 19, 2016 to 2019 | 0 | 7 |
| 2020s | 3 | 28 |
Most recent health-based violation before October 19, 2016: Combined Uranium, began October 2015, Resolved.
Show all 140 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Uranium
Contaminant limit exceeded
Measured 47 µg/L, federal limit 30 µg/L (1.6 times the limit)
|
Oct 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 56 µg/L, federal limit 30 µg/L (1.9 times the limit)
|
Oct 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 59 µg/L, federal limit 30 µg/L (2 times the limit)
|
Jul 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 41 µg/L, federal limit 30 µg/L (1.4 times the limit)
|
Jul 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 32 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
Apr 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 69 µg/L, federal limit 30 µg/L (2.3 times the limit)
|
Apr 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Apr 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 31 µg/L, federal limit 30 µg/L (at or just above the limit)
|
Jan 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 64 µg/L, federal limit 30 µg/L (2.1 times the limit)
|
Jan 1, 2015 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jan 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jan 1, 2015 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jan 1, 2015 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.1 mg/L, federal limit 4 mg/L (at or just above the limit)
|
Jan 1, 2015 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 33 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
Oct 1, 2014 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 74 µg/L, federal limit 30 µg/L (2.5 times the limit)
|
Oct 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Oct 1, 2014 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.2 mg/L, federal limit 4 mg/L (1.1 times the limit)
|
Oct 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Oct 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2014 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 116 µg/L, federal limit 30 µg/L (3.9 times the limit)
|
Jul 1, 2014 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.2 mg/L, federal limit 4 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Jul 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jul 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Apr 1, 2014 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.3 mg/L, federal limit 4 mg/L (1.1 times the limit)
|
Apr 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Apr 1, 2014 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 32 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
Apr 1, 2014 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 129 µg/L, federal limit 30 µg/L (4.3 times the limit)
|
Apr 1, 2014 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 31 µg/L, federal limit 30 µg/L (at or just above the limit)
|
Jan 1, 2014 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 93 µg/L, federal limit 30 µg/L (3.1 times the limit)
|
Jan 1, 2014 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Jan 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jan 1, 2014 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.4 mg/L, federal limit 4 mg/L (1.1 times the limit)
|
Jan 1, 2014 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 70 µg/L, federal limit 30 µg/L (2.3 times the limit)
|
Oct 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Oct 1, 2013 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.4 mg/L, federal limit 4 mg/L (1.1 times the limit)
|
Oct 1, 2013 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Oct 1, 2013 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.5 mg/L, federal limit 4 mg/L (1.1 times the limit)
|
Jul 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jul 1, 2013 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Jul 1, 2013 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 41 µg/L, federal limit 30 µg/L (1.4 times the limit)
|
Jul 1, 2013 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 57 µg/L, federal limit 30 µg/L (1.9 times the limit)
|
Jul 1, 2013 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.1 mg/L, federal limit 4 mg/L (at or just above the limit)
|
Apr 1, 2013 | Resolved |
|
Fluoride
Contaminant limit exceeded
Measured 4.6 mg/L, federal limit 4 mg/L (1.2 times the limit)
|
Apr 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Apr 1, 2013 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 82 µg/L, federal limit 30 µg/L (2.7 times the limit)
|
Apr 1, 2013 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 52 µg/L, federal limit 30 µg/L (1.7 times the limit)
|
Apr 1, 2013 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Apr 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jan 1, 2013 | Resolved |
90 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
Arizona regulators took 1 formal enforcement action against Antelope Peak DWID in 2011. The most recent was a compliance order (no penalty) in August 2011.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 12, 2011 | Arizona | Compliance order (no penalty) | 207 violations (124 health-based): Combined Uranium, Nitrate, Arsenic, Combined Radium (-226 and -228), Radium-228 |
What the violations mean
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.
Nitrate
1 incidentNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Combined Uranium
1 incidentTest results for Combined Uranium were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Antelope Peak DWID draws water from 2 wells.
Annual water quality report
Antelope Peak DWID 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 Antelope Peak DWID 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