Is OCOTILLO OASIS, LLC required to publish a Consumer Confidence Report?

Yes. OCOTILLO OASIS, LLC is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is OCOTILLO OASIS, LLC’s next Consumer Confidence Report due?

OCOTILLO OASIS, LLC’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

SAN MARCOS, CA · San Diego County

OCOTILLO OASIS, LLC Water System

Consumer Confidence Report status

OCOTILLO OASIS, LLC must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show 1 item for OCOTILLO OASIS, LLC that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.

System facts

System ID (PWSID): CA3700291
System type: Community Water System
Population served: 96
Service connections: 55
Ownership: privately owned
Water source: groundwater (wells)

OCOTILLO OASIS, LLC is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 96 people from groundwater.

As of August 1, 2026, its federal record holds 25 entries between 1980 and 2024, of which 1 remains open; none are health-based.

Of the 25, 13 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves inorganic chemicals, the Total Coliform Rules, and the Radionuclides and Revised Rad Rule.

Violation history

Monitoring, Regular
—
Fluoride
July 1, 2024 – September 30, 2024
Archived
Monitoring, Regular
—
Nitrate
February 1, 2024 – February 29, 2024
Archived
Monitoring, Regular
—
Fluoride
October 31, 2023 – December 31, 2023
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2023
Addressed
Monitoring, Regular
—
Fluoride
September 1, 2023 – September 30, 2023
Archived
Monitoring, Regular
—
Fluoride
July 1, 2023 – September 30, 2023
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2023 – March 31, 2023
Archived
Monitoring, Regular
—
Fluoride
July 1, 2022 – September 30, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2021 – September 30, 2021
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2017 – March 31, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2016 – December 31, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 2016 – June 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2015 – September 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2014 – December 31, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
March 1, 2014 – March 31, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
June 1, 2013 – June 30, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2008 – November 30, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2007 – October 31, 2007
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
December 4, 1989 – December 3, 1990
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 30, 1980 – October 29, 1981
Archived
Monitoring, Check/Repeat/Confirmation
—
Fluoride
June 1, 1980 – May 31, 1982
Archived

Archived closed in EPA's records (typically due to age or a data correction)Addressed corrective action reported, pending final confirmationResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2024 – September 30, 2024	Monitoring, Regular	Fluoride	—	Archived
February 1, 2024 – February 29, 2024	Monitoring, Regular	Nitrate	—	Archived
October 31, 2023 – December 31, 2023	Monitoring, Regular	Fluoride	—	Archived
October 1, 2023	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Addressed
September 1, 2023 – September 30, 2023	Monitoring, Regular	Fluoride	—	Archived
July 1, 2023 – September 30, 2023	Monitoring, Regular	Fluoride	—	Archived
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
July 1, 2022 – September 30, 2022	Monitoring, Regular	Fluoride	—	Archived
July 1, 2021 – September 30, 2021	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
January 1, 2017 – March 31, 2017	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
October 1, 2016 – December 31, 2016	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
April 1, 2016 – June 30, 2016	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
March 1, 2014 – March 31, 2014	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
June 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
November 1, 2008 – November 30, 2008	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2008 – September 30, 2008	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2007 – October 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
December 4, 1989 – December 3, 1990	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
October 1, 1981 – September 30, 1982	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
October 30, 1980 – October 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
June 1, 1980 – May 31, 1982	Monitoring, Check/Repeat/Confirmation	Fluoride	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)Addressed corrective action reported, pending final confirmationResolved addressed and confirmed by the state

Enforcement actions

June 8, 2017State Administrative/Compliance Order without penalty issued14 linked violations
February 5, 2015State Administrative/Compliance Order without penalty issued1 linked violation
November 14, 2014State Administrative/Compliance Order without penalty issued1 linked violation
September 30, 2014State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
June 30, 2014State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
March 28, 2014State Administrative/Compliance Order without penalty issued1 linked violation
December 31, 2008State Compliance achieved2 linked violations
October 13, 2008State Administrative/Compliance Order without penalty issued1 linked violation
July 9, 2008State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record

Common questions

Is OCOTILLO OASIS, LLC required to publish a Consumer Confidence Report?: Yes. OCOTILLO OASIS, LLC is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is OCOTILLO OASIS, LLC’s next Consumer Confidence Report due?: OCOTILLO OASIS, LLC’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OCOTILLO OASIS, LLC have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 item for OCOTILLO OASIS, LLC that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

HEARN, KRISTI

760-809-6964

SAN MARCOS, CA 92078