Public water system record
CS Rancheros Bonitos Water Company
Serves an area of Yuma County, AZ that includes Yuma · 120 people served
Federal records show 19 health-based violations and 40 monitoring/reporting issues for CS Rancheros Bonitos Water Company in the last ten years. The most serious issue in this window was a Combined Uranium violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 19
- Resolved
- 5
- Unresolved
- 0
- Archived by EPA
- 14
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 40
Key facts
- CS Rancheros Bonitos Water Company draws water from 1 well.
- Highest measured level in the last 10 years: Combined Uranium, 37 µg/L, federal limit 30 µg/L (1.2 times the limit), 2025.
- Most recent formal enforcement: compliance order (no penalty) by Arizona, September 2022.
- Record on file since 1989, with 0 health-based violations before October 20, 2016.
- Lead pipe inventory: 0 lead and 13 unknown out of 47 service lines.
Check whether CS Rancheros Bonitos 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 |
|---|---|---|---|---|
|
Combined Uranium
Contaminant limit exceeded
Measured 34 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
340 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 35 µg/L, federal limit 30 µg/L (1.2 times the limit)
|
340 | Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 37 µg/L, federal limit 30 µg/L (1.2 times the limit)
|
340 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 34 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
340 | Jul 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 34 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
340 | Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 31 µg/L, federal limit 30 µg/L (at or just above the limit)
|
340 | Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 32 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
340 | Oct 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 31 µg/L, federal limit 30 µg/L (at or just above the limit)
|
340 | Jul 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 31 µg/L, federal limit 30 µg/L (at or just above the limit)
|
340 | Apr 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 31 µg/L, federal limit 30 µg/L (at or just above the limit)
|
340 | Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 33 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
340 | Oct 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
Measured 33 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
340 | Jul 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 4, 2022 | Resolved | No |
|
Combined Uranium
Contaminant limit exceeded
Measured 32 µg/L, federal limit 30 µg/L (1.1 times the limit)
|
340 | Apr 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 6, 2022 | Resolved | No |
|
Combined Uranium
Contaminant limit exceeded
Measured 31 µg/L, federal limit 30 µg/L (at or just above the limit)
|
340 | Jan 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Revised Total Coliform Rule
Contaminant limit exceeded
|
110 | Apr 1, 2021 | Resolved | Yes |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Apr 1, 2018 | Resolved | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Dec 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Combined Uranium
Monitoring and reporting
|
Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Public Notice
OTHER
|
Sep 4, 2025 | Resolved |
|
Public Notice
OTHER
|
Mar 2, 2025 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Public Notice
OTHER
|
Nov 24, 2024 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Oct 1, 2024 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Apr 29, 2023 | Resolved |
|
Public Notice
OTHER
|
Oct 24, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Feb 27, 2021 | Resolved |
|
Public Notice
OTHER
|
Feb 27, 2021 | Resolved |
|
Public Notice
OTHER
|
Feb 21, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Feb 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Nov 26, 2020 | Resolved |
|
Public Notice
OTHER
|
Aug 5, 2020 | Resolved |
|
Public Notice
OTHER
|
Jul 25, 2020 | Resolved |
|
Public Notice
OTHER
|
Feb 22, 2020 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Feb 1, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jul 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jun 1, 2019 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2018 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Aug 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Nov 3, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jun 1, 2017 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2016 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2015 | Resolved |
Full record since 1989
EPA's records for CS Rancheros Bonitos Water Company go back to 1989. Before October 20, 2016 they list no health-based violations and 102 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 1990s | 0 | 51 |
| 2000s | 0 | 31 |
| 2010 to October 19, 2016 | 0 | 19 |
| October 20, 2016 to 2019 | 2 | 15 |
| 2020s | 17 | 23 |
Enforcement actions
Arizona regulators took 1 formal enforcement action against CS Rancheros Bonitos Water Company in 2022. The most recent was a compliance order (no penalty) in September 2022.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 12, 2022 | Arizona | Compliance order (no penalty) | 18 violations (14 health-based): Combined Uranium |
What the violations mean
Combined Uranium
14 incidentsTest results for Combined Uranium were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Groundwater Rule
2 incidentsThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Lead and Copper Rule
2 incidentsThe system did not complete a treatment step or action that the Lead and Copper Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Where the water comes from
CS Rancheros Bonitos Water Company draws water from 1 well.
Annual water quality report
CS Rancheros Bonitos 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 CS Rancheros Bonitos 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