Twain Harte Community Services District
EPA ID: CA5510005 · 2,378 people served · 3 ZIP codes
ZipCheckup's reading of EPA SDWIS for Twain Harte Community Services District (CA5510005): 1 EPA violation in the last five years. Twain Harte Community Services District carries 1 resolved violation in the five-year EPA record - each has been formally closed, and the supplier, which serves approximately 2,378 people, now meets all applicable federal drinking water standards with no open enforcement activity remaining.
Data: EPA SDWIS
Service Area Map
Coverage area for Twain Harte Community Services District Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Twain Harte Community Services District serves a community with a median household income of $85,956 and an estimated 32,843 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Twain Harte Community Services District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Infrastructure Risk
Detected Contaminants
How Twain Harte Community Services District compares to EPA limits
What This Means For You
Consumer Confidence Report Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 3 detections recorded.
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
Twain Harte Community Services District (EPA ID: CA5510005) is a community water system in California that serves approximately 2,378 people from surface water sources.
This system provides water to 3 ZIP codes across 3 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 0 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 |
|---|---|---|---|
| April 1, 2025 | Consumer Confidence Report 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 |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting 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.
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 Twain Harte Community Services District (CA5510005) on EPA.gov.
Frequently Asked Questions
Is Twain Harte Community Services District water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Twain Harte Community Services District; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Twain Harte Community Services District serve?
Twain Harte Community Services District serves approximately 2,378 people across 3 ZIP codes in California.
Where does Twain Harte Community Services District get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Twain Harte Community Services District: 1 EPA Violation. https://zipcheckup.com/water-system/ca5510005/
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title = {{Twain Harte Community Services District: 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca5510005/}
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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
Twain Harte Community Services District (EPA ID: CA5510005) - request the latest Consumer Confidence Report or ask about specific contaminants.