Public water system · ID5160079
ActiveIdpr Castle Rocks Sp
At a glance
Idpr Castle Rocks Sp (PWSID ID5160079) is an active transient non-community water system in Cassia County, Idaho. It reports serving 25 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Idpr Castle Rocks Sp compare with other water systems in Cassia County?
By EPA's size categories, Idpr Castle Rocks Sp is a very small system (500 people or fewer). Cassia County has 49 active public water systems. Its population served is well below the county average of 387 people per system, and accounts for 0.1% of the 18,963 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Idpr Castle Rocks Sp is well below 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. Idaho has 954 active transient non-community water systems, 49% of the state's 1,961 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,861 Idaho systems (95%) list groundwater as their primary source.
Who owns and regulates Idpr Castle Rocks Sp?
EPA lists Idpr Castle Rocks Sp as owned by a state government. 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. 3 of the 49 active systems in Cassia County (6.1%) are also owned by a state government.
Does Idpr Castle Rocks Sp have drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in January 2026. The violations listed here began between July 2012 and January 2026. By type: 6 contaminant level above the legal limit, 2 monitoring, 2 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 of them). EPA lists 8 as archived and 4 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 |
|---|---|---|---|---|
| 2026-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2018-12-06 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2018-12-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-10-15 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2014-10-15 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2014-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2014-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2014-04-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2014-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2012-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2012-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
The 12 most recent 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.
Idpr Castle Rocks Sp: frequently asked questions
Who runs Idpr Castle Rocks Sp?
Idpr Castle Rocks Sp (PWSID ID5160079) is a transient non-community water system owned by a state government. It is regulated by the ID state drinking water program.
How many people does Idpr Castle Rocks Sp serve?
Idpr Castle Rocks Sp reports serving 25 people through 4 service connections in Cassia County, Idaho.
Where does Idpr Castle Rocks Sp 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 Idpr Castle Rocks Sp have any drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in January 2026. 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 Idpr Castle Rocks Sp'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. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in January 2026. For current results, consult EPA ECHO, or the ID state drinking water program.
Where can I find Idpr Castle Rocks Sp's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Idpr Castle Rocks Sp 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 Cassia County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Burley Water Dept | Cassia | 10,345 | Community | Groundwater |
| Oakley City of | Cassia | 821 | Community | Groundwater |
| LDS Church Unity #5038650 | Cassia | 525 | Transient non-community | Groundwater |
| Oakley Valley Water Corporation | Cassia | 500 | Community | Groundwater |
| Itd Cotterell P O E | Cassia | 450 | Transient non-community | Groundwater |
| Malta Schools | Cassia | 440 | Non-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, “Idpr Castle Rocks Sp, PWSID ID5160079, Idaho”, https://aquacensus.com/water-systems/idaho/idpr-castle-rocks-sp-id5160079 (data as of October 1, 2026).