Mason, City Of Water System's tap water quality report is the compilation of data collected from federal, state, and local government agencies, most prominently the EPA. We strive to populate the report with the latest data concerning water contaminants, lead and copper levels, and water quality violations. We only collect drinking water data from public water systems.

PWS Service Information
PWS ID: MI0004170
Type: Community water system
EPA Region: 05
Primary Service Area: Residential Area
Primary Source: Ground water
Population Served: 8,252
Contact Information
P.O. Box 370
201 West Ash
MASON, MI 48854

This public water system services 1 municipality in 1 county.

We could not find test result data for Mason, City Of.
However, this area is serviced by 45 or more other public water systems. Check your water bill to see which specific system applies. Here is a list of related systems:

See 35 more related public water systems »

Summary Results

A summary view of tests in which a water contaminant found to exceed the Maximum Contaminant Level (MCL) set by the EPA.

We couldn't find any records of contaminants exceeding the regulated limits in your water.

Other Water Contaminants Tested

The following contaminants were tested and found to be within national EPA guidelines.

We couldn't find any records of contaminants in your water.

Lead and Copper Data

Lead and copper are recorded separately from other contaminants because of the Lead and Copper Rule. As with all other results, these are the findings at the water supply level. Lead and copper can be — and often are — deposited in drinking water in between the water facility and your tap.

Sample ID Contaminant Sampling Start Date Sampling End Date Result
MI205697 lead 2014-01-01 2016-12-31 0.002mg/L
MI156165 lead 2013-01-01 2013-12-31 0.001mg/L
MI148509 lead 2012-01-01 2012-12-31 0mg/L
MI118706 lead 2011-01-01 2011-12-31 0.002mg/L
MI96753 lead 2010-01-01 2010-06-30 0.002mg/L
MI96985 lead 2009-07-01 2009-12-31 0.002mg/L
MI84131 lead 2009-01-01 2009-06-30 0.002mg/L
MI84132 copper 2009-01-01 2009-06-30 2.255mg/L
MI79758 lead 2008-01-01 2008-06-30 0.004mg/L
MI79759 copper 2008-01-01 2008-06-30 1.772mg/L


Known violations of the Safe Drinking Water Act as recorded by the EPA.

Compliance Dates Rule Violation Type Contaminant Name Status
2005-01-04 - 2009-01-13 Radionuclides Maximum Contaminant Level Violation, Average Combined Radium (-226 and -228) Returned to Compliance
2003-10-01 - 2003-10-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
- N/A Radionuclides Monitoring, Regular Gross Alpha, Excl. Radon and U Returned to Compliance
- N/A Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
- N/A Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance

Local Water Testing

Find a lab in your area so you can get your tap or well water tested. This list contains both governmental and private labs, all of which are EPA-certified for drinking water testing.

Lab Location Zip Code
Water Tech Howell, MI 48843
Merit Laboratories, Inc. East Lansing, MI 48823
Ionia Wastewater Treatment Plant Ionia, MI 48846

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about Mason, City Of (MI0004170).

What My Water Data Means

Water data isn't always easy to interpret, but by following the links on this page you should be able to have most of your questions answered. By clicking the name of a water contaminant or secondary substance you can learn about that specific substance. Ultimately this page should give you some insight towards learning if your water is safe, what water filter you should buy (if any), and how well your local water compares against other sources.


The origin of's water data is explained on our Data Sources page.

Why Is My Water Data Not More Recent?

The recency of the data for your ZIP code depends on the last your water source was tested, by a federal, state, or local agency. More information about the timing can be determined by learning about the dataset in question and seeing how often the EPA (other another governing body) mandated testing.