Public water system record
Sonoita Valley (South) Water Company
Serves Sonoita, Santa Cruz County, AZ · 169 people served
Federal records show 1 health-based violation and 25 monitoring/reporting issues for Sonoita Valley (South) Water Company in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 25
Key facts
- Sonoita Valley (South) Water Company draws water from 2 wells.
- Record on file since 1985, with 3 health-based violations before October 19, 2016.
Check whether Sonoita Valley (South) Water Company 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 |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Oct 18, 2025 | Active |
|
Public Notice
OTHER
|
Dec 20, 2024 | Active |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Oct 1, 2024 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Oct 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Apr 28, 2024 | Resolved |
|
Public Notice
OTHER
|
Apr 28, 2024 | Resolved |
|
Public Notice
OTHER
|
May 18, 2023 | Resolved |
|
Public Notice
OTHER
|
May 18, 2023 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
Full record since 1985
EPA's records for Sonoita Valley (South) Water Company go back to 1985. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 75 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 27 |
| 2000s | 0 | 34 |
| 2010 to October 18, 2016 | 3 | 14 |
| October 19, 2016 to 2019 | 0 | 4 |
| 2020s | 1 | 21 |
Most recent health-based violation before October 19, 2016: Combined Uranium, began October 2012, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Uranium
Contaminant limit exceeded
Measured 36 µg/L, federal limit 30 µg/L (1.2 times the limit)
|
Oct 1, 2012 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 32 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
Jan 1, 2012 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 40 µg/L, federal limit 30 µg/L (1.3 times the limit)
|
Jan 1, 2012 | Resolved |
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.
Where the water comes from
Sonoita Valley (South) Water Company draws water from 2 wells.
Annual water quality report
Sonoita Valley (South) Water Company 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 Sonoita Valley (South) Water Company 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