Public water system · CA2600589
ActiveCal Trans - Crestview Rest Area
At a glance
Cal Trans - Crestview Rest Area (PWSID CA2600589) is an active transient non-community water system in Mono County, California. It reports serving 300 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Cal Trans - Crestview Rest Area compare with other water systems in Mono County?
By EPA's size categories, Cal Trans - Crestview Rest Area is a very small system (500 people or fewer). Mono County has 84 active public water systems. Its population served is about 29% below the county average of 424 people per system, and accounts for 0.8% of the 35,602 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Cal Trans - Crestview Rest Area is about twice that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. California has 3,016 active transient non-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 Cal Trans - Crestview Rest Area?
EPA lists Cal Trans - Crestview Rest Area as owned by a state 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. 2 of the 84 active systems in Mono County (2.4%) are also owned by a state government.
Does Cal Trans - Crestview Rest Area have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2019. The violations listed here began between October 1982 and January 2019. By type: 7 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 7 as archived and 1 as resolved. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1983-12-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-05-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-04-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-03-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1982-12-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1982-11-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1982-10-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
All 8 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.
Cal Trans - Crestview Rest Area: frequently asked questions
Who runs Cal Trans - Crestview Rest Area?
Cal Trans - Crestview Rest Area (PWSID CA2600589) is a transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Cal Trans - Crestview Rest Area serve?
Cal Trans - Crestview Rest Area reports serving 300 people through 1 service connection in Mono County, California.
Where does Cal Trans - Crestview Rest Area 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 Cal Trans - Crestview Rest Area have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2019. 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 Cal Trans - Crestview Rest Area'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 8 violations for this system; none is health-based, and the most recent began in January 2019. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Cal Trans - Crestview Rest Area's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cal Trans - Crestview Rest Area is a 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 Mono County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mammoth Cwd | Mono | 8,234 | Community | Surface water |
| Mammoth Mountain Ski Area - Outpost 14 | Mono | 7,736 | Non-transient non-community | Groundwater |
| June Lake PUD - Down Canyon | Mono | 2,810 | Community | Surface water |
| June Lake PUD Village | Mono | 2,763 | Community | Surface water |
| Usmc/Mtn Warfare Trng Ctr - Bridgeport | Mono | 1,200 | Community | Groundwater |
| Mammoth Lakes Basin | Mono | 1,000 | 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, “Cal Trans - Crestview Rest Area, PWSID CA2600589, California”, https://aquacensus.com/water-systems/california/cal-trans-crestview-rest-area-ca2600589 (data as of October 1, 2026).