SB 46 Michigan Senate · 2025-2026 Regular Session

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

SB 46 updates regulations for water delivery systems in mobile home parks by amending existing water supply laws (1976 PA 399). The bill directly affects mobile home park owners and residents by requiring these systems to meet specific reliability and safety standards. Key provisions include setting requirements for system maintenance, water quality testing, and emergency response protocols for parks relying on shared water infrastructure. This change ensures consistent, safe water access for mobile home park communities under revised regulatory guidelines.

Issues: ✓ Environment ✓ Housing

Bill status passed 3 of 5 stages cleared

Introduction

Feb 2025

Committee Review

Jun 2025

Senate Passage

Jun 2025

House Passage

Governor

Introduced Feb 4, 2025 Last action Jun 26, 2025

Maddy AI version diff · 2 comparisons

What changed between versions

Substitute (S-2) → As Passed by the Senate · 5 edits · Jun 26, 2025

MODERATE

This bill updates the Safe Drinking Water Act by adding new definitions for terms like 'water hauler' and 'transient noncommunity water supply' to clarify regulatory boundaries. It expands the Department of Environmental Quality's authority to inspect mobile home parks and issue emergency orders without prior notice if public health is at risk. The changes aim to improve clarity in enforcement and ensure safer water supplies for vulnerable populations in mobile home communities.

Scope change

The bill expands the Department's enforcement powers specifically to include mobile home parks and seasonal mobile home parks, allowing inspections and emergency orders that were not explicitly detailed in the previous version.

DEFINITION

Added definitions for 'water hauler', 'transient noncommunity water supply', and 'year-round service' to clarify who and what falls under the act's regulations.

Updated the definition of 'capacity assessment' to explicitly include maintaining compliance with the act and its rules.

ENFORCEMENT

Granted the Department authority to enter mobile home parks consisting only of customer site piping to investigate water quality complaints.

Allowed the Department to issue immediate emergency orders without a prior hearing if a public water supply poses an imminent hazard to public health.

REQUIREMENT

Strengthened requirements for suppliers to make structural changes or add capacity to meet state drinking water standards when notified by the Department.

Floor votes · Senate Jun 26, 2025

How they voted

28–10

Passed

Total votes 38

Jun 26, 2025

D Democratic19

19 Yea

100% Yea

R Republican19

9 Yea 10 Nay

52% Nay

Vote distribution

All Yea All Nay Mixed No data

Full legislative history

Actions timeline

Total actions

Key actions

Committee

Jun 26, 2025

Committee

referred to Committee on Regulatory Reform

lower

Jun 26, 2025

Introduced

received on 06/26/2025

lower

Jun 26, 2025

Upper · Passed

PASSED ROLL CALL # 183 YEAS 28 NAYS 9 EXCUSED 0 NOT VOTING 0

upper

Jun 26, 2025

Upper · Passed

SUBSTITUTE (S-2) ADOPTED

upper

Jun 4, 2025

Upper · Passed

REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITHOUT AMENDMENT(S)

upper

May 21, 2025

Committee

REFERRED TO COMMITTEE OF THE WHOLE

upper

May 21, 2025

Upper · Passed

REPORTED FAVORABLY WITHOUT AMENDMENT 5/20/2025

upper

Feb 4, 2025

Committee

REFERRED TO COMMITTEE ON HOUSING AND HUMAN SERVICES

upper

Feb 4, 2025

Introduced

INTRODUCED BY SENATOR JEFF IRWIN

upper

1 primary · 9 co-sponsors