Public water system · CA4600064
ActiveTnf-Cal-Ida Well
At a glance
Tnf-Cal-Ida Well (PWSID CA4600064) is an active transient non-community water system in Sierra County, California. It reports serving 200 people through 1 service connection. 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, 8 are health-based, and the most recent began in October 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Tnf-Cal-Ida Well compare with other water systems in Sierra County?
By EPA's size categories, Tnf-Cal-Ida Well is a very small system (500 people or fewer). Sierra County has 32 active public water systems. Its population served is about 11% below the county average of 224 people per system, and accounts for 2.8% of the 7,169 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 Tnf-Cal-Ida Well is about 39% above 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 Tnf-Cal-Ida Well?
EPA lists Tnf-Cal-Ida Well 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. 1 of the 32 active systems in Sierra County (3.1%) are also owned by a state government.
Does Tnf-Cal-Ida Well have drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in October 2015. The violations listed here began between October 1982 and October 2015. By type: 8 contaminant level above the legal limit, 2 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (10 of them). EPA lists 10 as resolved and 2 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 |
|---|---|---|---|---|
| 2015-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2012-06-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-10-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1984-09-01 | 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 |
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.
Tnf-Cal-Ida Well: frequently asked questions
Who runs Tnf-Cal-Ida Well?
Tnf-Cal-Ida Well (PWSID CA4600064) 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 Tnf-Cal-Ida Well serve?
Tnf-Cal-Ida Well reports serving 200 people through 1 service connection in Sierra County, California.
Where does Tnf-Cal-Ida Well 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 Tnf-Cal-Ida Well have any drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in October 2015. 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 Tnf-Cal-Ida Well'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, 8 are health-based, and the most recent began in October 2015. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Tnf-Cal-Ida Well's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Tnf-Cal-Ida Well 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 Sierra County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tnf-Logger & Stampede Rc | Sierra | 1,200 | Transient non-community | Groundwater |
| City of Loyalton | Sierra | 983 | Community | Groundwater |
| Downieville Public U.D. | Sierra | 783 | Community | Surface water |
| Sierra Csa #5, Sierra Brooks | Sierra | 726 | Community | Groundwater |
| Sierra Water Resources - Sierra City | Sierra | 324 | Community | Groundwater |
| Bassett'S Station | Sierra | 300 | 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, “Tnf-Cal-Ida Well, PWSID CA4600064, California”, https://aquacensus.com/water-systems/california/tnf-cal-ida-well-ca4600064 (data as of October 1, 2026).