F0/100
Zwolle Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 11,019 residents · Louisiana
What's In Zwolle's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
9
Violations (last 5yr)
2
Unresolved
8
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: July 3, 2024 – January 27, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: May 21, 2024Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2024 – June 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2024 – March 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: August 1, 2023Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2022 – December 31, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2022 – September 30, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2022 – June 30, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2022 – March 31, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issued
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
TOWN OF ZWOLLE WATER SYSTEM
Population Served
2,520
Water Source
Groundwater
System ID
LA1085032
EBARB WWKS DIST #1 - NORTH EBARB
Population Served
1,761
Water Source
Groundwater
System ID
LA1085043
EBARB WWKS DIST # 1 - AIMWELL AREA
Population Served
6,738
Water Source
Purchased Groundwater
System ID
LA1085059
Frequently Asked Questions About Zwolle Water
Is Zwolle tap water safe to drink?
Zwolle, Louisiana tap water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 213 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Zwolle's water?
Of the 31 contaminants tested in Zwolle's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Zwolle have any water quality violations?
Yes, Zwolle has 213 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, Other, MR. 173 of these are health-based violations, which are the most serious category.
Do I need a water filter in Zwolle?
Zwolle water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Zwolle's tap water come from?
Zwolle's drinking water is sourced from groundwater and supplied by TOWN OF ZWOLLE WATER SYSTEM and 2 other water system(s). The system serves approximately 11,019 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Zwolle's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Zwolle's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Zwolle's water compare to other cities in Louisiana?
Zwolle's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Louisiana state page to see how all cities in the state compare.
What should I do if I'm concerned about Zwolle's water quality?
If you have concerns about Zwolle's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (TOWN OF ZWOLLE WATER SYSTEM) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.