MARICOPA MOUNTAIN DWID 1
PWSID: AZ0411087 · Maricopa, AZ · Serves 450 people
According to EPA Safe Drinking Water Information System (SDWIS), MARICOPA MOUNTAIN DWID 1 (PWSID AZ0411087) in Maricopa, AZ is listed as a CWS water system covering about 450 people. The same extract lists 54 health-based violation records spanning 2011-2025. Those 54 health-based rows for MARICOPA MOUNTAIN DWID 1 cover contaminants such as Nitrate, Arsenic; they remain historical EPA registry entries, not a current compliance or drinkability score.
MARICOPA MOUNTAIN DWID 1 has 54 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 2 distinct EPA contaminant codes appear in this system's record, including Nitrate, Arsenic. Recorded violations span 2011–2025. Day-to-day primacy enforcement for this system runs through the Arizona drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Arizona state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- AZ0411087
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Maricopa, AZ
- Population Served
- 450
- Health Violations
- Yes (54)
What contaminants are in this water system?
Violation History (54)
| Contaminant | Health | Date |
|---|---|---|
| Nitrate | Yes | Oct 1, 2025 |
| Nitrate | Yes | Jul 1, 2025 |
| Nitrate | Yes | Apr 1, 2025 |
| Nitrate | Yes | Jan 1, 2025 |
| Nitrate | Yes | Jan 1, 2025 |
| Nitrate | Yes | Oct 1, 2024 |
| Nitrate | Yes | Oct 1, 2024 |
| Nitrate | Yes | Jul 1, 2024 |
| Nitrate | Yes | Jul 1, 2024 |
| Nitrate | Yes | Jul 1, 2024 |
| Nitrate | Yes | Apr 1, 2024 |
| Nitrate | Yes | Apr 1, 2024 |
| Nitrate | Yes | Jan 1, 2024 |
| Nitrate | Yes | Jan 1, 2024 |
| Nitrate | Yes | Oct 1, 2023 |
| Nitrate | Yes | Oct 1, 2023 |
| Nitrate | Yes | Oct 1, 2023 |
| Nitrate | Yes | Jul 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
| Nitrate | Yes | Jan 1, 2023 |
| Nitrate | Yes | Jan 1, 2023 |
| Nitrate | Yes | Oct 1, 2022 |
| Nitrate | Yes | Oct 1, 2022 |
| Nitrate | Yes | Jul 1, 2022 |
| Nitrate | Yes | Jul 1, 2022 |
| Nitrate | Yes | Apr 1, 2022 |
| Nitrate | Yes | Apr 1, 2022 |
| Nitrate | Yes | Jan 1, 2022 |
| Nitrate | Yes | Jan 1, 2022 |
| Nitrate | Yes | Oct 1, 2021 |
| Nitrate | Yes | Jul 1, 2021 |
| Arsenic | Yes | Jul 1, 2021 |
| Nitrate | Yes | Apr 1, 2021 |
| Arsenic | Yes | Apr 1, 2021 |
| Nitrate | Yes | Jan 1, 2021 |
| Arsenic | Yes | Jan 1, 2021 |
| Nitrate | Yes | Oct 1, 2020 |
| Arsenic | Yes | Oct 1, 2020 |
| Nitrate | Yes | Jul 1, 2020 |
| Nitrate | Yes | Apr 1, 2020 |
| Nitrate | Yes | Jan 1, 2020 |
| Nitrate | Yes | Oct 1, 2019 |
| Nitrate | Yes | Jul 1, 2019 |
| Nitrate | Yes | Apr 1, 2019 |
| Nitrate | Yes | Apr 1, 2016 |
| Nitrate | Yes | Jan 1, 2016 |
| Nitrate | Yes | Jul 1, 2015 |
| Nitrate | Yes | Jan 1, 2015 |
| Nitrate | Yes | Oct 1, 2014 |
| Nitrate | Yes | Jul 1, 2014 |
| Nitrate | Yes | Apr 1, 2014 |
| Nitrate | Yes | Jul 1, 2011 |
| Nitrate | Yes | Jan 1, 2011 |
Frequently Asked Questions
What does EPA SDWIS list for MARICOPA MOUNTAIN DWID 1?
How many people does MARICOPA MOUNTAIN DWID 1 serve?
What violations does MARICOPA MOUNTAIN DWID 1 have?
What contaminants have been found in MARICOPA MOUNTAIN DWID 1 water?
Compare beyond Arizona
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest MARICOPA MOUNTAIN DWID 1 on cumulative violation count (54) and EPA-reported population served (450). Violation-count peers include MITCHELL CO RWD 2, PRETTY PRAIRIE, CITY OF, TOWN OF LOGANSPORT WATER SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
MARICOPA MOUNTAIN DWID 1 (AZ0411087) is drawn from EPA SDWIS. Nearby county systems in this extract include QUEEN CREEK TOWN OF; EPCOR - SAN TAN; GW SANTA CRUZ WATER CO; GRIC DPW Wild Horse Pass. Health-based rows (54 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.