DUNCAN TOWN OF
PWSID: AZ0406001 · Duncan, AZ · Serves 605 people
According to EPA Safe Drinking Water Information System (SDWIS), DUNCAN TOWN OF (PWSID AZ0406001) in Duncan, AZ is listed as a CWS water system covering about 605 people. The same extract lists 8 health-based violation records spanning 2024-2025. Those 8 health-based rows for DUNCAN TOWN OF cover contaminants such as Di(2-ethylhexyl) phthalate, Groundwater Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
DUNCAN TOWN OF has 8 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 Di(2-ethylhexyl) phthalate, Groundwater Rule. Recorded violations span 2024–2025. 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)
- AZ0406001
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Duncan, AZ
- Population Served
- 605
- Health Violations
- Yes (8)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Di(2-ethylhexyl) phthalate | 6 | 6 |
| Groundwater Rule | 2 | 2 |
Violation History (8)
| Contaminant | Health | Date |
|---|---|---|
| Di(2-ethylhexyl) phthalate | Yes | Jan 1, 2025 |
| Di(2-ethylhexyl) phthalate | Yes | Jan 1, 2025 |
| Di(2-ethylhexyl) phthalate | Yes | Jan 1, 2025 |
| Di(2-ethylhexyl) phthalate | Yes | Oct 1, 2024 |
| Di(2-ethylhexyl) phthalate | Yes | Oct 1, 2024 |
| Di(2-ethylhexyl) phthalate | Yes | Oct 1, 2024 |
| Groundwater Rule | Yes | Feb 11, 2024 |
| Groundwater Rule | Yes | Feb 11, 2024 |
Frequently Asked Questions
What does EPA SDWIS list for DUNCAN TOWN OF?
How many people does DUNCAN TOWN OF serve?
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Compare beyond Arizona
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest DUNCAN TOWN OF on cumulative violation count (8) and EPA-reported population served (605). Violation-count peers include Mashantucket Pequot Water System, San Ildefonso Pueblo, TOWAOC WATER SYSTEM. Population peers include BIGELOW WATERWORKS, MICANOPY WATER SYSTEM, LYON-SIOUX RWS-BOYDEN.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
DUNCAN TOWN OF (AZ0406001) is drawn from EPA SDWIS. Nearby county systems in this extract include MORENCI WATER ELEC CO CLIFTON; VALLEY VIEW MHC & RV PARK; HUNTER WATER - TOWN OF DUNCAN. Health-based rows (8 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.