Public water system · ID1280246
ActiveSienna Ridge Estates
At a glance
Sienna Ridge Estates (PWSID ID1280246) is an active community water system in Kootenai County, California. It reports serving 81 people through 31 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in March 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
81
Service connections
31
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sienna Ridge Estates compare with other water systems in Kootenai County?
By EPA's size categories, Sienna Ridge Estates is a very small system (500 people or fewer). Kootenai County has 1 active public water system, and Sienna Ridge Estates is the largest of them by population served. Its population served is roughly in line with the county average of 81 people per system, and accounts for 100% of the 81 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Sienna Ridge Estates is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active community water systems, 40% 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 Sienna Ridge Estates?
EPA lists Sienna Ridge Estates as privately owned. The ID state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 1 active systems in Kootenai County (100%) are also privately owned.
Does Sienna Ridge Estates have drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in March 2020. The violations listed here began between December 2012 and March 2020. By type: 3 public notice, recordkeeping or other, 3 monitoring and reporting, 2 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Public Notice (3 of them). EPA lists 3 as unaddressed, 3 as resolved and 3 as archived. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2020-03-02 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2019-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-12-20 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2016-10-05 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2014-09-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2014-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2013-06-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2013-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2012-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 9 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.
Sienna Ridge Estates: frequently asked questions
Who runs Sienna Ridge Estates?
Sienna Ridge Estates (PWSID ID1280246) is a community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Sienna Ridge Estates serve?
Sienna Ridge Estates reports serving 81 people through 31 service connections in Kootenai County, California.
Where does Sienna Ridge Estates 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 Sienna Ridge Estates have any drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in March 2020. 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 Sienna Ridge Estates' 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 9 violations for this system; 3 are health-based, and the most recent began in March 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the ID state drinking water program.
Where can I find Sienna Ridge Estates' water quality report?
As a community water system, Sienna Ridge Estates must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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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, “Sienna Ridge Estates, PWSID ID1280246, California”, https://aquacensus.com/water-systems/california/sienna-ridge-estates-id1280246 (data as of October 1, 2026).