Town of Zwolle Water System
EPA ID: LA1085032 · 2,520 people served · 2 ZIP codes
Right now, Town of Zwolle Water System shows 37 EPA violations marked active and unresolved — the provider continues to supply approximately 2,520 residents while each finding awaits closure.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 6 (2024) to 24 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Town of Zwolle Water System Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The Town of Zwolle Water System serves a community with a median household income of $48,050 and an estimated 6,604 residents across its service area. Approximately 50% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 71% 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?
Town of Zwolle Water System'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.
About 3% of homes in Sabine Parish, Louisiana rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Town of Zwolle Water System compares to EPA limits
What This Means For You
Haloacetic Acids (HAA5) at 33 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Total Trihalomethanes (TTHM) at 3 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Lead and Copper Rule at 9 mg/L exceeds the EPA maximum of mg/L.
Contaminant 0700 at 4 mg/L exceeds the EPA maximum of mg/L.
Stage 1 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Haloacetic Acids (HAA5) was detected in this water system. granular activated carbon (GAC) 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
Town of Zwolle Water System (EPA ID: LA1085032) is a community water system in Louisiana that serves approximately 2,520 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Average Home Safety Score: B (77/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| April 27, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| April 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| February 12, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| January 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| November 22, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| November 13, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| October 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| July 3, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| May 23, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| May 21, 2024 | Contaminant 0700 | Health-based | Unresolved |
| April 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| January 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Resolved |
| October 1, 2023 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| July 1, 2023 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 33 | Yes |
| Lead and Copper Rule | Treatment Failure | 9 | No |
| Contaminant 0700 | Other Violation | 4 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 3 | Yes |
| Stage 1 DBP Rule | Treatment Failure | 2 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
| Consumer Confidence Report Rule | Reporting Failure | 1 | Yes |
Health Risk Details
Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)
Cancer risk; reproductive & developmental effects At-risk groups: pregnant women, infants, long-term consumers of chlorinated municipal water.
Removal methods: granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →
Total Trihalomethanes (TTHM) (EPA limit: 0.08 mg/L)
Bladder & rectal cancer risk; reproductive concerns At-risk groups: pregnant women, long-term consumers of chlorinated water, people who frequently shower in chlorinated water.
Removal methods: granular activated carbon (GAC), carbon block filter, point-of-entry aeration. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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 LA 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 Town of Zwolle Water System (LA1085032) on EPA.gov.
Frequently Asked Questions
Is Town of Zwolle Water System water safe to drink?
Town of Zwolle Water System has recorded 41 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Town of Zwolle Water System serve?
Town of Zwolle Water System serves approximately 2,520 people across 2 ZIP codes in Louisiana.
Where does Town of Zwolle Water System get its water?
The primary water source is groundwater.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from Town Of Zwolle Water System Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: Town Of Zwolle Water System Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment chemicals and what each one does
Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.
Watershed exposure sources reported
Land-use and natural conditions identified in the utility's source-water assessment as potential contamination sources upstream of treatment.
Treatment classification and chemical list sourced from Town Of Zwolle Water System Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Notable events and violations
This section summarizes events the utility chose to disclose in its most recent Consumer Confidence Report, plus any federal compliance violations the utility recorded against itself. Both lists are utility-authored — ZipCheckup does not audit, judge, or reorder them.
Federal compliance violations on record
These entries are taken verbatim from the utility's CCR violations section. EPA defines four broad violation categories: Maximum Contaminant Level (MCL), Treatment Technique (TT), Monitoring & Reporting (M&R), and Public Notification (PN).
-
MCL, LRAA · TTHM12/31/2023 - 12/30/2024
TTHM MCL exceeded in all 4 quarters of 2024; highest LRAA 104 ppb at HWY 171 S vs MCL 80 ppb
Violations record from Town Of Zwolle Water System Consumer Confidence Report.
Notable events from the utility's CCR
These bullet entries are the utility's own narration of operational, regulatory, or infrastructure events during the reporting period.
- Source water fluoride 5.5 ppm exceeds MCL of 4 ppm; treated fluoride reduced to 2.8 ppm — dental fluorosis notice issued
- Groundwater Rule significant deficiencies: fencing inadequate + backflow prevention issues
ZipCheckup note: items above reflect what the utility published in its most recent CCR. Federal violation records are also tracked separately by the EPA Safe Drinking Water Information System (SDWIS) — the SDWIS record is the authoritative federal source for any specific regulatory action.
Frequently Asked Questions
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
Town of Zwolle Water System (EPA ID: LA1085032) — request the latest Consumer Confidence Report or ask about specific contaminants.