Public water system · CA2300874
ActiveMontessori Del Mar Learning Center
At a glance
Montessori Del Mar Learning Center (PWSID CA2300874) is an active non-transient non-community water system in Mendocino County, California. It reports serving 50 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
3
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Montessori Del Mar Learning Center compare with other water systems in Mendocino County?
By EPA's size categories, Montessori Del Mar Learning Center is a very small system (500 people or fewer). Mendocino County has 144 active public water systems. Its population served is well below the county average of 576 people per system, and accounts for less than 0.1% of the 82,868 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Montessori Del Mar Learning Center is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. California has 1,466 active non-transient non-community water systems, 20% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Montessori Del Mar Learning Center?
EPA lists Montessori Del Mar Learning Center as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 98 of the 144 active systems in Mendocino County (68%) are also privately owned.
Does Montessori Del Mar Learning Center have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024. The violations listed here began between January 2015 and October 2024. By type: 4 monitoring and reporting. The contaminants or rules involved are Lead and Copper Rule, E. coli, Total coliform bacteria (TCR) and Nitrate. EPA lists 3 as resolved and 1 as addressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Addressed means the violation is not resolved or archived and is covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Addressed |
| 2015-08-01 | Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19 | E. colicode 3014 | No | Resolved |
| 2015-08-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 4 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Montessori Del Mar Learning Center: frequently asked questions
Who runs Montessori Del Mar Learning Center?
Montessori Del Mar Learning Center (PWSID CA2300874) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Montessori Del Mar Learning Center serve?
Montessori Del Mar Learning Center reports serving 50 people through 3 service connections in Mendocino County, California.
Where does Montessori Del Mar Learning Center get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Montessori Del Mar Learning Center have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Montessori Del Mar Learning Center's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Montessori Del Mar Learning Center's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Montessori Del Mar Learning Center is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Mendocino County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ukiah, City of | Mendocino | 16,607 | Community | Surface water |
| Fort Bragg, City of | Mendocino | 6,919 | Community | Surface water |
| Willits, City of | Mendocino | 6,175 | Community | Surface water |
| Millview County Water District | Mendocino | 5,500 | Community | Surface water |
| Redwood Valley County Water District | Mendocino | 5,200 | Community | Surface water |
| Willow County Water District | Mendocino | 3,797 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Montessori Del Mar Learning Center, PWSID CA2300874, California”, https://aquacensus.com/water-systems/california/montessori-del-mar-learning-center-ca2300874 (data as of October 1, 2026).