B63/100
Knox Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 3,700 residents · Indiana
What's In Knox's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
4
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved
Maximum contaminant level violation
When: October 30, 2021 – November 24, 2021Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to conduct Level 1 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 24, 2021 – September 30, 2021Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
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
KNOX WATER WORKS
Population Served
3,700
Water Source
Groundwater
System ID
IN5275002
Frequently Asked Questions About Knox Water
Is Knox tap water safe to drink?
Knox, Indiana tap water receives a grade of B (63/100), which is considered good. Out of 31 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Knox's water?
31 contaminants were tested in Knox's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Knox have any water quality violations?
Yes, Knox has 29 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, TT, MCL. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Knox?
Knox 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. All contaminants are within health goals.
Where does Knox's tap water come from?
Knox's drinking water is sourced from groundwater and supplied by KNOX WATER WORKS. The system serves approximately 3,700 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Knox'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. Knox'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 Knox's water compare to other cities in Indiana?
Knox's water quality score of 63/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Indiana state page to see how all cities in the state compare.
What should I do if I'm concerned about Knox's water quality?
If you have concerns about Knox'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 (KNOX WATER WORKS) 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.