Public water system record
Sierrita Mountain Water Coop
Serves Tucson and Three Points, Pima County, AZ · 258 people served
Federal records show no health-based violations and 9 monitoring/reporting issues for Sierrita Mountain Water Coop in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 9
Key facts
- Sierrita Mountain Water Coop draws water from 2 wells.
- Most recent formal enforcement: compliance order with a penalty by Arizona, February 2004.
- Record on file since 1987, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 27 unknown out of 68 service lines.
Check whether Sierrita Mountain Water Coop 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2025 | Active |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
Chlorine
Monitoring and reporting
|
May 1, 2025 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2016 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2016 | Resolved |
Full record since 1987
EPA's records for Sierrita Mountain Water Coop go back to 1987. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 114 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 20 |
| 1990s | 1 | 51 |
| 2000s | 3 | 40 |
| 2010 to October 18, 2016 | 0 | 3 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 6 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2008, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1998 | Resolved |
Enforcement actions
Arizona regulators took 1 formal enforcement action against Sierrita Mountain Water Coop in 2004. The most recent was a compliance order with a penalty in February 2004.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 11, 2004 | Arizona | Compliance order with a penalty | 74 violations (3 health-based): Total Coliform, Toluene, BHC-GAMMA, Diquat, Glyphosate |
Where the water comes from
Sierrita Mountain Water Coop draws water from 2 wells.
Annual water quality report
Sierrita Mountain Water Coop 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 Sierrita Mountain Water Coop 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