Tranquillity Irrigation District
EPA ID: CA1010030 · 807 people served · 4 ZIP codes
ZipCheckup's reading of EPA SDWIS for Tranquillity Irrigation District (CA1010030): 2 unresolved EPA violations on record. Pulled from the federal compliance ledger, 2 violations at Tranquillity Irrigation District remain without resolution - the utility delivers drinking water to roughly 807 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Tranquillity Irrigation District Source: EPA SDWIS service area boundaries.
Service area boundary - Grade B
Service Area Demographics
The Tranquillity Irrigation District serves a community with a median household income of $58,005 and an estimated 6,042 residents across its service area. Approximately 56% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 62% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Tranquillity Irrigation District's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How Tranquillity Irrigation District compares to EPA limits
What This Means For You
Barium at 4 mg/L exceeds the EPA maximum of 2 mg/L.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Comparable Water Systems
Similar-sized systems in California
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Tranquillity Irrigation District (EPA ID: CA1010030) is a community water system in California that serves approximately 807 people from groundwater sources.
This system provides water to 4 ZIP codes across 4 communities.
ZIP-Area Home Safety Context: B (71/100)
This is the average Home Safety Score for 1 of 4 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 4 archived, 0 addressed, and 2 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2025 | Barium | Health-based | Archived |
| July 1, 2025 | Barium | Health-based | Archived |
| April 1, 2025 | Barium | Health-based | Archived |
| January 31, 2025 | Barium | Health-based | Archived |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unaddressed (current) |
| October 17, 2024 | Stage 2 DBP Rule | Non-health-based | Unaddressed (current) |
| October 1, 2024 | Stage 1 DBP Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Barium | Inorganic | 4 | Yes |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CA or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Tranquillity Irrigation District (CA1010030) on EPA.gov.
Frequently Asked Questions
Is Tranquillity Irrigation District water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current health-based noncompliance record for Tranquillity Irrigation District. Review the utility's current notices and EPA record. This system-level compliance history cannot determine conditions at a specific tap.
How many people does Tranquillity Irrigation District serve?
Tranquillity Irrigation District serves approximately 807 people across 4 ZIP codes in California.
Where does Tranquillity Irrigation District get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Tranquillity Irrigation District (CA): 5 Health Violations. https://zipcheckup.com/water-system/ca1010030/
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title = {{Tranquillity Irrigation District (CA): 5 Health Violations}},
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url = {https://zipcheckup.com/water-system/ca1010030/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Tranquillity Irrigation District (EPA ID: CA1010030) - request the latest Consumer Confidence Report or ask about specific contaminants.