Public water system record
Del Oro River Island Serv Terr #1
Serves an area of Tulare County, CA · 1,280 people served
Federal records show 32 health-based violations and 3 monitoring/reporting issues for Del Oro River Island Serv Terr #1 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
Source water
Surface water
ZIP
95927
EPA system ID
CA5400665
- Health-based violations, last 10 years
- 32
- Resolved
- 1
- Unresolved
- 0
- Archived by EPA
- 31
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 3
Key facts
- Del Oro River Island Serv Terr #1 draws water from 9 wells and 1 surface water intake (1 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Nitrate, 13 mg/L, federal limit 10 mg/L (1.3 times the limit), 2024.
- Most recent formal enforcement: compliance order (no penalty) by California, July 2024.
- Record on file since 1980, with 56 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 468 service lines.
Check whether Del Oro River Island Serv Terr #1 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
|
340 | Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Nitrate
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
330 | Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Combined Uranium
Contaminant limit exceeded
|
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
|
340 | Oct 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Nitrate
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
330 | Aug 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jul 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Nitrate
Contaminant limit exceeded
Measured 11.3 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jul 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11.7 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jun 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Combined Uranium
Contaminant limit exceeded
|
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
|
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
|
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
|
340 | Jul 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
|
340 | Apr 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
|
340 | Jan 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
|
340 | Oct 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jul 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Apr 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Oct 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jul 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Apr 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jan 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Oct 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jul 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Apr 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jan 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Apr 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jan 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Oct 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Uranium
Contaminant limit exceeded
|
340 | Jul 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Nitrate
Contaminant limit exceeded
Measured 12.1 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jul 1, 2017 | Resolved | Yes |
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
|
Jan 1, 2012 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2005 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2003 | Resolved |
Full record since 1980
EPA's records for Del Oro River Island Serv Terr #1 go back to 1980. Before October 19, 2016 they list 56 health-based violations (21 resolved, 35 archived by EPA without a recorded fix) and 16 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 6 |
| 1990s | 2 | 1 |
| 2000s | 31 | 7 |
| 2010 to October 18, 2016 | 23 | 2 |
| October 19, 2016 to 2019 | 10 | 0 |
| 2020s | 22 | 0 |
Most recent health-based violation before October 19, 2016: Combined Uranium, began July 2016, Archived.
Show all 56 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2016 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2016 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2016 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2015 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2015 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2015 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2015 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2014 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2014 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2014 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2014 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2013 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2013 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2013 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2013 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2012 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2012 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2012 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2012 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2011 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2011 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2011 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2011 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2009 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 2008 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2008 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 2007 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2007 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 1, 2007 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2007 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2007 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Jan 1, 2007 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2006 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 1, 2006 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
|
Jul 1, 2006 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2006 | Archived |
|
Combined Uranium
Contaminant limit exceeded
|
Oct 1, 2005 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2005 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
|
Apr 1, 2005 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Dec 1, 2004 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2004 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2004 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 2003 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 1, 2003 | Resolved |
6 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
California regulators took 12 formal enforcement actions against Del Oro River Island Serv Terr #1 between 2003 and 2024. The most recent was a compliance order (no penalty) in July 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jul 15, 2024 | California | Compliance order (no penalty) | 1 violation (1 health-based): Nitrate |
| Aug 21, 2023 | California | Compliance order (no penalty) | 4 violations (4 health-based): Nitrate |
| Nov 16, 2017 | California | Compliance order (no penalty) | 28 violations (28 health-based): Nitrate, Combined Uranium |
| Nov 18, 2011 | California | Compliance order (no penalty) | 24 violations (23 health-based): Combined Uranium, Nitrate |
| Dec 10, 2009 | California | Compliance order (no penalty) | 1 violation (1 health-based): Combined Uranium |
| Oct 16, 2008 | California | Compliance order (no penalty) | 18 violations (17 health-based): Combined Uranium, Nitrate |
| Oct 13, 2005 | California | Compliance order (no penalty) | 1 violation (1 health-based): Combined Uranium |
| Jul 15, 2005 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Mar 15, 2005 | California | Compliance order (no penalty) | 1 violation (1 health-based): Nitrate |
| Oct 15, 2004 | California | Compliance order (no penalty) | 3 violations (2 health-based): Nitrate |
| Jan 14, 2004 | California | Compliance order (no penalty) | 1 violation (1 health-based): Nitrate |
| Sep 10, 2003 | California | Compliance order (no penalty) | 2 violations (2 health-based): Nitrate |
What the violations mean
Combined Uranium
27 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.
Nitrate
5 incidentsNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Where the water comes from
Del Oro River Island Serv Terr #1 draws water from 9 wells and 1 surface water intake (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Del Oro River Island Serv Terr #1 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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 California.
Certified drinking water labs by state EPA guidance for private wells