Public water system record
Tierra Buena MHP #1
Serves Yuba City, Sutter County, CA · 50 people served
Federal records show 1 health-based violation and 2 monitoring/reporting issues for Tierra Buena MHP #1 in the last ten years. The most serious issue in this window was a Nitrate violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 2
Key facts
- Tierra Buena MHP #1 draws water from 1 well.
- Highest measured level in the last 10 years: Nitrate, 11.67 mg/L, federal limit 10 mg/L (1.2 times the limit), 2022.
- Most recent formal enforcement: compliance order (no penalty) by California, August 2022.
- Record on file since 1979, with 7 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 17 service lines.
Check whether Tierra Buena MHP #1 serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 11.67 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jul 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Groundwater Rule
OTHER
|
Oct 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jun 3, 1999 | Resolved |
Full record since 1979
EPA's records for Tierra Buena MHP #1 go back to 1979. Before October 19, 2016 they list 7 health-based violations (2 resolved, 5 archived by EPA without a recorded fix) and 12 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1980s | 5 | 7 |
| 1990s | 1 | 3 |
| 2000s | 1 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform (acute), began January 2002, Resolved.
Show all 7 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jan 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1996 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Apr 2, 1986 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Aug 26, 1985 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 1983 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 1982 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 22, 1981 | Archived |
Enforcement actions
California regulators took 1 formal enforcement action against Tierra Buena MHP #1 in 2022. The most recent was a compliance order (no penalty) in August 2022.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 24, 2022 | California | Compliance order (no penalty) | 1 violation (1 health-based): Nitrate |
What the violations mean
Nitrate
1 incidentNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Where the water comes from
Tierra Buena MHP #1 draws water from 1 well.
Annual water quality report
Tierra Buena MHP #1 must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Tierra Buena MHP #1 for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.
Certified drinking water labs by state EPA guidance for private wells