A92/100
Missouri Valley Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 2,684 residents · Iowa
What's In Missouri Valley'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) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 1, 2024 – August 19, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Failed to conduct Level 1 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 9, 2022Rule: Consumer Confidence 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
MISSOURI VALLEY WATER SUPPLY
Population Served
2,684
Water Source
Groundwater
System ID
IA4344088
Frequently Asked Questions About Missouri Valley Water
Is Missouri Valley tap water safe to drink?
Missouri Valley, Iowa tap water receives a grade of A (92/100), which is considered excellent. 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 Missouri Valley's water?
Of the 1 contaminants tested in Missouri Valley'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 Missouri Valley have any water quality violations?
Yes, Missouri Valley has 5 EPA violation(s) on record, with the most recent in 2024. Violation types include MR. None of these are classified as health-based violations.
Do I need a water filter in Missouri Valley?
Missouri Valley 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 Missouri Valley's tap water come from?
Missouri Valley's drinking water is sourced from groundwater and supplied by MISSOURI VALLEY WATER SUPPLY. The system serves approximately 2,684 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Missouri Valley'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. Missouri Valley'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 Missouri Valley's water compare to other cities in Iowa?
Missouri Valley's water quality score of 92/100 earns a grade of A, which is considered excellent. This places Missouri Valley among the better-performing water systems in Iowa. Visit our Iowa state page to see how all cities in the state compare.
What should I do if I'm concerned about Missouri Valley's water quality?
If you have concerns about Missouri Valley'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 (MISSOURI VALLEY WATER SUPPLY) 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.