A88/100
Middleburg Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 190,208 residents · Florida
What's In Middleburg's Tap Water?
73
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
2
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: February 1, 2022 – March 1, 2022Rule: Total Coliform 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
KEYSTONE POSTMASTER GRID
Population Served
5,092
Water Source
Groundwater
System ID
FL2100610
LAKE ASBURY GRID
Population Served
27,001
Water Source
Groundwater
System ID
FL2100626
ORANGE PARK GRID
Population Served
127,904
Water Source
Groundwater
System ID
FL2100741
PACE FLEMING GRID
Population Served
30,211
Water Source
Groundwater
System ID
FL2104391
Frequently Asked Questions About Middleburg Water
Is Middleburg tap water safe to drink?
Middleburg, Florida tap water receives a grade of A (88/100), which is considered excellent. Out of 73 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 2 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Middleburg's water?
Of the 73 contaminants tested in Middleburg's water supply, the most notable include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Middleburg have any water quality violations?
Yes, Middleburg has 20 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, RPT, MR. 4 of these are health-based violations, which are the most serious category.
Do I need a water filter in Middleburg?
Middleburg 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. 2 contaminant(s) exceed these stricter goals.
Where does Middleburg's tap water come from?
Middleburg's drinking water is sourced from groundwater and supplied by KEYSTONE POSTMASTER GRID and 3 other water system(s). The system serves approximately 190,208 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Middleburg'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. Middleburg'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 Middleburg's water compare to other cities in Florida?
Middleburg's water quality score of 88/100 earns a grade of A, which is considered excellent. This places Middleburg among the better-performing water systems in Florida. Visit our Florida state page to see how all cities in the state compare.
What should I do if I'm concerned about Middleburg's water quality?
If you have concerns about Middleburg'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 (KEYSTONE POSTMASTER GRID) 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.