Marshalltown, Iowa: Is the Tap Water Safe to Drink?
2026 EPA water quality data for 16 community water systems serving 35,331+ residents. See violations, PFAS results, lead test results, and safety grades — free.
Is Marshalltown Tap Water Safe to Drink?
Based on the latest EPA data, Marshalltown tap water meets all federal drinking water standards. All 16 tested systems have received a safety grade of A or B, with no active health-based violations.
Marshalltown Water Quality Overview
Marshalltown, Iowa is served by 16 community water systems providing water to approximately 35,331 residents. These systems draw from groundwater (14), surface water purchased (1), other (1) sources. Marshalltown water systems have recorded 22 health-based violations in their history, though none are currently active. Including monitoring and reporting violations, there are 135 total violations on record.
Find Your Water System
Search by ZIP code to find your exact water provider and see its full EPA report.
All 16 water systems in Marshalltown
Looking for water quality data across the whole state? See our full Iowa tap water safety report covering Iowa’s EPA-regulated water systems.
Marshalltown Drinking Water: Frequently Asked Questions
Is Marshalltown, Iowa tap water safe to drink?
Based on the latest EPA data, Marshalltown tap water meets all federal drinking water standards. All 16 tested systems have received a safety grade of A or B, with no active health-based violations.
How many water utilities serve Marshalltown, Iowa?
16 community water systems serve Marshalltown, Iowa, providing water to approximately 35,331 people. Different neighborhoods may be served by different utilities. Enter your ZIP code at the top to find your specific provider.
Does Marshalltown tap water have lead?
Lead in drinking water typically enters from old pipes and fixtures inside homes and buildings, not from the treatment plant. The EPA requires water systems to monitor for lead under the Lead and Copper Rule. Click any water system above to see its most recent 90th-percentile lead test results. Homes built before 1986 are most likely to have lead plumbing components.
What contaminants have been found in Marshalltown drinking water?
EPA violation records for Marshalltown water systems are listed on each utility's report page. Common regulated contaminants include disinfection byproducts (TTHMs, HAA5), coliform bacteria, nitrates, and lead. Click any utility above to see its full violation history going back 10 years.
How do I find out which water company serves my address in Marshalltown?
Enter your Marshalltown ZIP code in the search box at the top of this page. ClearWater will identify the specific water system serving your area and show you its EPA violation history, lead test results, and an overall safety grade. You can also check your water bill or your utility's annual Consumer Confidence Report (CCR).