AJO, AZ · Pima County
AJO IMPROVEMENT COMPANY Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Arizona’s official records. Always confirm current status with Arizona before making decisions based on this information.
System facts
- System ID (PWSID)
- AZ0410001
- System type
- Community Water System
- Population served
- 2,654
- Service connections
- 1,200
- Ownership
- public/private mix
- Water source
- groundwater (wells)
Violation history
Monitoring and Reporting (DBP)
—Chlorine
July 1, 2018 – September 30, 2018
ResolvedMonitoring, Regular
—Barium
October 1, 1988 – December 31, 1988
ArchivedMonitoring, Regular
—Chromium
October 1, 1988 – December 31, 1988
ArchivedMonitoring, Regular
—Cadmium
October 1, 1988 – December 31, 1988
ArchivedMonitoring, Regular
—Selenium
October 1, 1988 – December 31, 1988
ArchivedMonitoring, Regular
—Nitrate
October 1, 1988 – December 31, 1988
ArchivedMonitoring, Regular
—Mercury
October 1, 1988 – December 31, 1988
ArchivedMonitoring, Regular
—Arsenic
October 18, 1985 – October 16, 1988
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2018 – September 30, 2018 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| October 1, 1988 – December 31, 1988 | Monitoring, Regular | Barium | — | Archived |
| October 1, 1988 – December 31, 1988 | Monitoring, Regular | Chromium | — | Archived |
| October 1, 1988 – December 31, 1988 | Monitoring, Regular | Cadmium | — | Archived |
| October 1, 1988 – December 31, 1988 | Monitoring, Regular | Selenium | — | Archived |
| October 1, 1988 – December 31, 1988 | Monitoring, Regular | Nitrate | — | Archived |
| October 1, 1988 – December 31, 1988 | Monitoring, Regular | Mercury | — | Archived |
| October 18, 1985 – October 16, 1988 | Monitoring, Regular | Arsenic | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
No enforcement actions on record for this system.
Contact
LANE, JOHN
520-387-2016
AJO, AZ 85321