Michigan 2025-2026 Regular Session

Michigan Senate Bill SB0504

Introduced
8/14/25  
Refer
8/14/25  
Report Pass
3/11/26  

Caption

Water supply: quality and standards; testing and reporting of the amount of microplastics in public drinking water supplies; require. Amends sec. 5 of 1976 PA 399 (MCL 325.1005) & adds sec. 6a.

Impact

The implications of SB 504 are significant, as it enhances the regulatory framework surrounding water quality in Michigan. By incorporating microplastics into the monitoring regime, the bill recognizes the increasing public health concerns regarding contaminants in drinking water. This legislation could lead to a more cautious approach in drinking water standards and provide state authorities with necessary data to mitigate any identified risks. Moreover, public water supplies are expected to be held to stricter accountability regarding the quality of water they deliver.

Summary

Senate Bill 504 aims to amend the existing Safe Drinking Water Act by introducing measures to monitor and report the presence of microplastics in public drinking water supplies. This bill requires the establishment and administration of a microplastics program that mandates testing on a quarterly basis. The program, which will begin in 2027 and run until 2030, is designed to gather baseline data and assess potential risks associated with microplastics found in drinking water. The monitoring will be conducted using established sampling methods endorsed by leading environmental and health organizations.

Contention

While SB 504 is largely supported due to its focus on protecting public health and ensuring safe drinking water, some concerns may arise regarding the feasibility of implementing such extensive testing. There could be debates around the costs involved in establishing the necessary infrastructure for regular testing and reporting. Additionally, stakeholders might question the potential impact on small water suppliers who may struggle with compliance. Environmental justice considerations are highlighted, as the implementation must also acknowledge and address disparities in water quality across different communities.

Companion Bills

No companion bills found.

Previously Filed As

MI HB4768

Water supply: quality and standards; testing and reporting of the amount of microplastics in public drinking water supplies; require. Amends sec. 5 of 1976 PA 399 (MCL 325.1005) & adds sec. 6a.

MI HB5673

Water supply: quality and standards; clean drinking water requirements in child care centers; modify. Amends secs. 3i & 3j of 1973 PA 116 (MCL 722.113i & 722.113j).

MI HB5674

Water supply: quality and standards; clean drinking water requirements in schools and child care centers; modify. Amends secs. 3, 5 & 7 of 2023 PA 154 (MCL 380.1903 et seq.).

MI SB0046

Water supply: systems; mobile home park water delivery systems; regulate. Amends secs. 2, 3 & 15 of 1976 PA 399 (MCL 325.1002, et seq.).

MI SB0577

Water supply: other; fees related to water resources; modify. Amends sec. 9 of 1976 PA 399 (MCL 325.1009).

MI HB5850

Water supply: systems; cyber-physical security and operational technology protections for public water systems; provide for. Amends sec. 21 of 1976 PA 399 (MCL 325.1021) & adds sec. 8a.

MI HB5507

Water supply: quality and standards; effective date of the clean drinking water access act; revise. Amends secs. 5 & 7 of 2023 PA 154 (MCL 380.1905 & 380.1907).

MI HB5895

Water supply: quality and standards; access to safe drinking water; require when a water source tests positive for polyfluoroalkyl substances (PFAS). Amends 1978 PA 368 (MCL 333.1101 - 333.25211) by adding secs. 12722, 12723 & 12724.

MI SB0564

Water supply: quality and standards; water quality protection fee; provide for. Amends sec. 8715 of 1994 PA 451 (MCL 324.8715).

MI S3837

Requires water suppliers to reimburse residential customers for drinking water testing under certain circumstances.

Similar Bills

MI HB4767

Environmental protection: hazardous products; Michigan statewide microplastics strategy; establish. Amends 1994 PA 451 (MCL 324.101 - 324.90106) by adding pt. 151.

MI SB0505

Environmental protection: hazardous products; Michigan statewide microplastics strategy; establish. Amends 1994 PA 451 (MCL 324.101 - 324.90106) by adding pt. 151.

HI HB965

Relating To Microplastics.

HI HB965

Relating To Microplastics.

MI SB0503

Trade: consumer goods and services; personal care products containing plastic microbeads; prohibit manufacture and acceptance for sale. Amends 1994 PA 451 (MCL 324.101 - 324.90106) by adding subpt. 3 to pt. 147.

HI SB2415

Relating To Microplastics.

MD HB1315

Department of the Environment - Vessel-Based Microplastic Particle Removal Technologies - Study

MI HB4768

Water supply: quality and standards; testing and reporting of the amount of microplastics in public drinking water supplies; require. Amends sec. 5 of 1976 PA 399 (MCL 325.1005) & adds sec. 6a.