C50/100
Hillsboro Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 12,380 residents · Missouri
What's In Hillsboro'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) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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
HILLSBORO PWS
Population Served
3,000
Water Source
Groundwater
System ID
MO6010368
JEFFERSON COUNTY PWSD 7
Population Served
6,100
Water Source
Groundwater
System ID
MO6024299
JCPSD SUMMER SET
Population Served
1,080
Water Source
Groundwater
System ID
MO6036031
RAINTREE PLANTATION
Population Served
2,200
Water Source
Groundwater
System ID
MO6036271
Frequently Asked Questions About Hillsboro Water
Is Hillsboro tap water safe to drink?
Hillsboro, Missouri tap water receives a grade of C (50/100), which is considered fair. 0 contaminant(s) exceed EPA maximum contaminant levels and 64 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Hillsboro's water?
Of the 31 contaminants tested in Hillsboro'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 Hillsboro have any water quality violations?
Yes, Hillsboro has 64 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, TT, RPT. 31 of these are health-based violations, which are the most serious category.
Do I need a water filter in Hillsboro?
Hillsboro 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 Hillsboro's tap water come from?
Hillsboro's drinking water is sourced from groundwater and supplied by HILLSBORO PWS and 3 other water system(s). The system serves approximately 12,380 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Hillsboro'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. Hillsboro'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 Hillsboro's water compare to other cities in Missouri?
Hillsboro's water quality score of 50/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Missouri state page to see how all cities in the state compare.
What should I do if I'm concerned about Hillsboro's water quality?
If you have concerns about Hillsboro'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 (HILLSBORO PWS) 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.