Jonestown Water Supply Corporation
EPA ID: TX2270011 · 7,902 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Jonestown Water Supply Corporation (TX2270011): 10 EPA violations in the last five years. The five-year EPA compliance file for Jonestown Water Supply Corporation contains 10 violations, each documented and subsequently closed - the utility now operates in full compliance and continues to supply approximately 7,902 residents with water meeting current federal standards, including both health-based and monitoring requirements.
Data: EPA SDWIS
Service Area Map
Coverage area for Jonestown Water Supply Corporation Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Jonestown Water Supply Corporation serves a community with a median household income of $108,393 and an estimated 15,042 residents across its service area.
🌊 Where Does Your Water Come From?
Jonestown Water Supply Corporation'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 Jonestown Water Supply Corporation compares to EPA limits
What This Means For You
Fecal Coliform at 6 presence exceeds the EPA maximum of presence.
Chlorite at 2 mg/L exceeds the EPA maximum of 1 mg/L. Anemia and nervous system effects in infants and children. Consider ferrous sulfate reduction filtration.
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper 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. 1 detection recorded.
Chlorite was detected in this water system. ferrous sulfate reduction filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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
Jonestown Water Supply Corporation (EPA ID: TX2270011) is a community water system in Texas that serves approximately 7,902 people from surface water sources.
This system serves ZIP code 78645 in Leander.
Violation History
Status breakdown for accepted records with record years 2021-2026: 10 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 |
|---|---|---|---|
| August 1, 2025 | Fecal Coliform | Non-health-based | Resolved |
| August 1, 2025 | Fecal Coliform | Non-health-based | Resolved |
| July 1, 2025 | Fecal Coliform | Non-health-based | Resolved |
| July 1, 2025 | Fecal Coliform | Non-health-based | Resolved |
| July 1, 2025 | Surface Water Treatment Rule | Non-health-based | Resolved |
| June 1, 2025 | Fecal Coliform | Non-health-based | Resolved |
| June 1, 2025 | Fecal Coliform | Non-health-based | Resolved |
| June 1, 2025 | Chlorite | Non-health-based | Resolved |
| June 1, 2025 | Chlorite | Non-health-based | Resolved |
| March 11, 2021 | Lead and Copper 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 |
|---|---|---|---|
| Fecal Coliform | Microbiological | 6 | No |
| Chlorite | Disinfection Byproducts | 2 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
| Lead and Copper 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 |
|---|---|---|
| 0.00127 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 TX or modeled from parcel and building-footprint data.
- 78645 - Leander
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Jonestown Water Supply Corporation (TX2270011) on EPA.gov.
Frequently Asked Questions
Is Jonestown Water Supply Corporation water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Jonestown Water Supply Corporation; its 10 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Jonestown Water Supply Corporation serve?
Jonestown Water Supply Corporation serves approximately 7,902 people across 1 ZIP code in Texas.
Where does Jonestown Water Supply Corporation get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Jonestown Water Supply Corporation (TX): 10 EPA Violations. https://zipcheckup.com/water-system/tx2270011/
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title = {{Jonestown Water Supply Corporation (TX): 10 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/tx2270011/}
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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
Jonestown Water Supply Corporation (EPA ID: TX2270011) - request the latest Consumer Confidence Report or ask about specific contaminants.