Public Water Supply Sampling Results [Michigan]
Michigan Dept. of Environment, Great Lakes, and Energy · 2025 Full Details
Tip: Check “Visit Source” link for download options.
| Attribute | Value |
|---|---|
| Click on map to inspect values | |
Full Details
- Title
- Public Water Supply Sampling Results [Michigan]
- Description
- The data includes information on State of Michigan drinking water Per- and Polyfluoroalkyl Substances (PFAS) compliance sampling, including, but not limited to, sample location, sample date, sample results, etc. The hexbins layer (hexagons are 3 miles in height) show the general location of all samples with the sample results. This data is static and was last pulled 05/18/25. The units for all drinking water PFAS results are measured in PPT (parts per trillion), equivalent to ng/l. Hexbin data (PFAS test results) for public water supplies come from the PFAS MCL monitoring results for compliance under Michigan's Safe Drinking Water Act (2020 - present). The locations that have been sampled in this effort include Community Water Supplies (including regional and municipal water supplies, manufactured housing communities, residential apartment buildings, etc.), and Nontransient Noncommunity Water Supplies (including schools, businesses, childcare providers, Michigan Head Start locations, etc.) Definitions of the information provided in the hexbin polygon layer: HexID: Unique ID for each hexbin polygon Shape_Area: Esri created field for the area in square meters Shape_Length: Esri created field for the length of the perimeter in meters Definitions of the information provided in the sampling results related table: HexID: Unique ID associated with the specific sampling results hexbin System Name: Water supply system name WSSN: Water Supply Serial Number; unique identifier for each public water supply. Sample Date: The date samples were taken at the water supply. PFAS analytes are listed in individual columns (ppt). These include the 7 regulated PFAS compounds tested under EPA method 537.1. If the result listed is "ND" the lab did not detect, or find, that PFAS was in the water sample above the method reporting limit. HFPO-DA (Hexafluoropropylene oxide-dimer acid, also referred to as "GenX") is a regulated analyte in Michigan with an MCL = 370 ppt PFBS (Perfluorobutane sulfonic acid) is a regulated analyte in Michigan with an MCL = 420 ppt PFHxA (perfluorohexanoic acid) is a regulated analyte in Michigan with an MCL = 400,000 ppt PFHxS (perfluorohexane sulfonic acid) is a regulated analyte in Michigan with an MCL = 51 ppt PFNA (perfluorononanoic acid) is a regulated analyte in Michigan with an MCL = 6 ppt PFOA (perfluorooctanoic acid) is a regulated analyte in Michigan with an MCL = 8 ppt PFOS (perfluorooctane sulfonic acid) is a regulated analyte in Michigan with an MCL = 16 ppt Sys Sample Code: The identification number that corresponds to the sample taken. Lab Name: Laboratory providing PFAS analysis via EPA method 537.1. Location Name: Specific sample location, when applicable. Lab Number: The certified lab code number. Note: LabName indicated values may vary for the same lab (issue with data coming from two different databases). LabNumber will help clarify these cases. <2: Analyte was not detected above the minimum reporting limit (2 ppt). The data represents the PFAS sample locations, with each location having multiple samples taken, dates for each sample, and the analytical results for each sample. These analytical results include detections for 7 PFAS compounds. Results are provided in parts per trillion. A part per trillion (ppt) is the equivalent of 1 drop of water in 20 Olympic-size swimming pools. This contains one hexbins layer (3 miles in height) showing the general location of the water sampling. The hexbins were created by EGLE using ArcGIS Online"s Aggregate Points tool . The layer contains one field called "HexID" that connects the general location with the results of samples found within the hexbin area. There is no precise location attached to the results for security. This data is used in the MPART: PFAS Geographic Information System ( item details ). For more information about Michigan"s PFAS response, please visit our State of Michigan PFAS Response website . Call 800-662-9278 for assistance with reading or interpreting this data. Questions regarding the drinking water sampling PFAS data can be directed to EGLE-PFAS-DrinkingWater@michigan.gov . To submit feedback on the data, please reach out to EGLE-Maps@Michigan.gov .
- Creator
- Michigan Dept. of Environment, Great Lakes, and Energy
- Temporal Coverage
- Last Modified: 2025-07-25
- Date Issued
- 2025-07-07
- Rights
- Due to database changes and upgrades, there may be duplicate records for the same PFAS sample. Often the SysSampleCode values will appear very similar with an additional letter or number at the beginning or additional letters and/or numbers at the end of the SysSampleCode. The WSSN and SampleDate will be the same for these duplicate sample records. Please contact EGLE PFAS Drinking Water for questions or assistance. This application or dataset, along with any maps, data, content and other information contained within it and all output from the application (together the “Information”), is provided as a public service, and there are no restrictions on the use, reproduction, or distribution of the Information. It is your responsibility to use the Information for a legally permissible purpose. This Information is provided “AS IS” and on an “AS AVAILABLE” basis. The State of Michigan (“State”) makes no warranties, express or implied, regarding the accuracy, adequacy, reliability, timeliness, or completeness of this Information. THE STATE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS INFORMATION, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF PROPRIETARY RIGHTS. THE STATE WILL NOT BE LIABLE, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR BY STATUTE OR OTHERWISE, FOR ANY CLAIM FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT, OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION LOST PROFITS AND LOST BUSINESS OPPORTUNITIES, RELATED TO THE ACCESS OR USE OF THIS INFORMATION. IN NO EVENT WILL THE STATE BE LIABLE FOR ANY AMOUNTS THAT MAY RESULT FROM THE ACCESS OR USE OF THIS INFORMATION, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, OR BY STATUTE OR OTHERWISE. By accessing or using this Information, you agree that you will not make any claims against the State or any of its departments, divisions, officers, or employees related to your use of the Information. These terms are governed by and interpreted under the laws of the State of Michigan without regard to conflict of laws provisions. Nothing in these terms is meant to impact or replace any existing rights or licenses, such as copyright, trademark, or patent protections, in materials or content that may be located on the site or portal containing the Information.
- Access Rights
- Public
- Format
- ArcGIS FeatureLayer
- Language
- English
- Date Added
- August 10, 2025
- Provenance Statement
- The metadata for this resource was last retrieved from State of Michigan Open Data Portal on 2025-08-24.
Resource Class
Resource Type
Theme
Place
Local Collection
Cite and Reference
-
Citation
Michigan Dept. of Environment, Great Lakes, and Energy (2025). Public Water Supply Sampling Results [Michigan]. . https://gis-michigan.opendata.arcgis.com/datasets/egle::public-water-supply-sampling-results-1 (web service) -
BTAA Geoportal Link
