Public water system · CA1400007
ActiveSierra Highland Csd
At a glance
Sierra Highland Csd (PWSID CA1400007) is an active community water system in Inyo County, California. It reports serving 600 people through 215 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
600
Service connections
215
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sierra Highland Csd compare with other water systems in Inyo County?
By EPA's size categories, Sierra Highland Csd is a small system (501 to 3,300 people). Inyo County has 112 active public water systems. Its population served is about 36% above the county average of 442 people per system, and accounts for 1.2% of the 49,451 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 Sierra Highland Csd 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 Sierra Highland Csd?
EPA lists Sierra Highland Csd as owned by a local government. 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. 25 of the 112 active systems in Inyo County (22%) are also owned by a local government.
Does Sierra Highland Csd have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2023. The violations listed here began between October 1979 and December 2023. By type: 5 monitoring and reporting, 1 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 4 as resolved and 3 as archived. 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 |
|---|---|---|---|---|
| 2023-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1981-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1980-10-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1979-10-30 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
All 7 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.
Sierra Highland Csd: frequently asked questions
Who runs Sierra Highland Csd?
Sierra Highland Csd (PWSID CA1400007) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Sierra Highland Csd serve?
Sierra Highland Csd reports serving 600 people through 215 service connections in Inyo County, California.
Where does Sierra Highland Csd 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 Sierra Highland Csd have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2023. 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 Sierra Highland Csd'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 7 violations for this system; none is health-based, and the most recent began in December 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Sierra Highland Csd's water quality report?
As a community water system, Sierra Highland Csd 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.
Other water systems in Inyo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bishop Creek Chevron | Inyo | 16,793 | Transient non-community | Groundwater |
| Bishop, City of | Inyo | 3,819 | Community | Groundwater |
| Petite Pantry | Inyo | 3,012 | Transient non-community | Groundwater |
| Lee'S Frontier | Inyo | 2,000 | Transient non-community | Groundwater |
| Inyo County PWD - Lone Pine | Inyo | 1,835 | Community | Purchased groundwater |
| Pearsonville Water System | Inyo | 1,515 | Transient non-community | Groundwater |
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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, “Sierra Highland Csd, PWSID CA1400007, California”, https://aquacensus.com/water-systems/california/sierra-highland-csd-ca1400007 (data as of October 1, 2026).