Public water system record
City of San Luis
Serves San Luis, Yuma County, AZ · 39,705 people served
Federal records show 2 health-based violations and 10 monitoring/reporting issues for City of San Luis in the last ten years. The most serious issue in this window was a resolved Groundwater Rule violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 10
Key facts
- City of San Luis draws water from 10 wells.
- Record on file since 1980, with 6 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 8,952 service lines.
Check whether City of San Luis 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 |
|---|---|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 6, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 5, 2021 | Resolved | No |
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, 2024 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Feb 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Sep 28, 2021 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Sep 8, 2021 | Resolved |
|
E. coli
Monitoring and reporting
|
Sep 1, 2021 | Resolved |
|
Revised Total Coliform Rule
OTHER
|
Aug 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
May 1, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Sep 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 12, 2015 | Resolved |
Full record since 1980
EPA's records for City of San Luis go back to 1980. Before October 19, 2016 they list 6 health-based violations (6 resolved) and 610 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 10 |
| 1990s | 1 | 188 |
| 2000s | 5 | 391 |
| 2010 to October 18, 2016 | 0 | 21 |
| October 19, 2016 to 2019 | 0 | 3 |
| 2020s | 2 | 6 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 2008, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1999 | Resolved |
What the violations mean
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.
Where the water comes from
City of San Luis draws water from 10 wells.
Annual water quality report
City of San Luis 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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