Public water system · CA5100112
ActiveTierra Buena MHP #1
At a glance
Tierra Buena MHP #1 (PWSID CA5100112) is an active community water system in Sutter County, California. It reports serving 50 people through 17 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in July 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
17
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Tierra Buena MHP #1 compare with other water systems in Sutter County?
By EPA's size categories, Tierra Buena MHP #1 is a very small system (500 people or fewer). Sutter County has 35 active public water systems. Its population served is well below the county average of 2,514 people per system, and accounts for less than 0.1% of the 87,991 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 Tierra Buena MHP #1 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 Tierra Buena MHP #1?
EPA lists Tierra Buena MHP #1 as privately owned. 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. 23 of the 35 active systems in Sutter County (66%) are also privately owned.
Does Tierra Buena MHP #1 have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in July 2022. The violations listed here began between July 1984 and July 2022. By type: 5 contaminant level above the legal limit, 4 monitoring and reporting and 3 public notice, recordkeeping or other. The contaminant or rule involved most often is Nitrate (4 of them). EPA lists 7 as resolved and 5 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 |
|---|---|---|---|---|
| 2022-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Archived |
| 2018-10-01 | Public notice, recordkeeping or otherNotification, State · code 05 | Groundwater Rulecode 0700 | No | Resolved |
| 2004-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-06-03 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1996-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1996-01-01 | 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 |
| 1986-04-02 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Archived |
| 1985-08-26 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Archived |
| 1984-08-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1984-07-01 | 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.
Tierra Buena MHP #1: frequently asked questions
Who runs Tierra Buena MHP #1?
Tierra Buena MHP #1 (PWSID CA5100112) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Tierra Buena MHP #1 serve?
Tierra Buena MHP #1 reports serving 50 people through 17 service connections in Sutter County, California.
Where does Tierra Buena MHP #1 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 Tierra Buena MHP #1 have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in July 2022. 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 Tierra Buena MHP #1'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, 5 are health-based, and the most recent began in July 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Tierra Buena MHP #1's water quality report?
As a community water system, Tierra Buena MHP #1 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 Sutter County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Yuba City | Sutter | 70,256 | Community | Surface water |
| City of Live Oak | Sutter | 9,285 | Community | Groundwater |
| Sutter Community S.D. | Sutter | 2,904 | Community | Groundwater |
| National American Corp. Lp-Lake Minden | Sutter | 1,065 | Transient non-community | Groundwater |
| Church of Glad Tidings | Sutter | 878 | Non-transient non-community | Groundwater |
| Wildewood East Mutual | Sutter | 350 | 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, “Tierra Buena MHP #1, PWSID CA5100112, California”, https://aquacensus.com/water-systems/california/tierra-buena-mhp-1-ca5100112 (data as of October 1, 2026).