CASAS ARROYO ASSOCIATION INC
PWSID: AZ0412020 · Sonoita, AZ · Serves 27 people
According to EPA Safe Drinking Water Information System (SDWIS), CASAS ARROYO ASSOCIATION INC (PWSID AZ0412020) in Sonoita, AZ is listed as a CWS water system covering about 27 people. The same extract lists 4 health-based violation records spanning 2024-2025. Those 4 health-based rows for CASAS ARROYO ASSOCIATION INC cover contaminants such as LEAD AND COPPER RULE REVISIONS, Groundwater Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
CASAS ARROYO ASSOCIATION INC has 4 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 LEAD AND COPPER RULE REVISIONS, 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)
- AZ0412020
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Sonoita, AZ
- Population Served
- 27
- Health Violations
- Yes (4)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | 3 | 3 |
| Groundwater Rule | 1 | 1 |
Violation History (4)
| Contaminant | Health | Date |
|---|---|---|
| Groundwater Rule | Yes | Mar 23, 2025 |
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
Frequently Asked Questions
What does EPA SDWIS list for CASAS ARROYO ASSOCIATION INC?
How many people does CASAS ARROYO ASSOCIATION INC serve?
What violations does CASAS ARROYO ASSOCIATION INC have?
What contaminants have been found in CASAS ARROYO ASSOCIATION INC water?
Compare beyond Arizona
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest CASAS ARROYO ASSOCIATION INC on cumulative violation count (4) and EPA-reported population served (27). Violation-count peers include Santo Domingo Pueblo, Isleta Eastside, PARSHALL-LUCKY MOUND.
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
CASAS ARROYO ASSOCIATION INC (AZ0412020) is drawn from EPA SDWIS. Nearby county systems in this extract include NOGALES CITY OF; PATAGONIA WATER DEPARTMENT; THE GRAND ACRES; KINO RANCH 2. Health-based rows (4 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.