B76/100
Doniphan Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 7,045 residents · Missouri
What's In Doniphan's Tap Water?
1
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
4
Violations (last 5yr)
0
Unresolved
2
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: September 9, 2024 – September 2, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Violation related to Consumer Confidence Report
When: July 1, 2024Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: January 9, 2022 – May 2, 2022Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 2Resolved
Violation related to Consumer Confidence Report
When: October 30, 2021Rule: Consumer Confidence RuleEnforcement: 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
DONIPHAN PWS
Population Served
2,000
Water Source
Groundwater
System ID
MO4010221
RIPLEY COUNTY PWSD 1 EAST
Population Served
2,265
Water Source
Groundwater
System ID
MO4024521
RIPLEY COUNTY PWSD 2
Population Served
2,780
Water Source
Groundwater
System ID
MO4024523
Frequently Asked Questions About Doniphan Water
Is Doniphan tap water safe to drink?
Doniphan, Missouri tap water receives a grade of B (76/100), which is considered good. Out of 1 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 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 Doniphan's water?
Of the 1 contaminants tested in Doniphan'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 Doniphan have any water quality violations?
Yes, Doniphan has 28 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, Other, TT. 9 of these are health-based violations, which are the most serious category.
Do I need a water filter in Doniphan?
Doniphan 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 Doniphan's tap water come from?
Doniphan's drinking water is sourced from groundwater and supplied by DONIPHAN PWS and 2 other water system(s). The system serves approximately 7,045 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Doniphan'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. Doniphan'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 Doniphan's water compare to other cities in Missouri?
Doniphan's water quality score of 76/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Missouri state page to see how all cities in the state compare.
What should I do if I'm concerned about Doniphan's water quality?
If you have concerns about Doniphan'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 (DONIPHAN 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.