---
type: "Bill"
title: "Public Utilities - Thermal Energy Network Systems - Authorization and Establishment (Working for Accessible Renewable Maryland Thermal Heat (WARMTH) Act)"
description: "Public Utilities - Thermal Energy Network Systems - Authorization and Establishment (Working for Accessible Renewable Maryland Thermal Heat (WARMTH) Act)"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2024"
identifier: "SB 570"
citation: "Maryland SB 570 (2024)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Hester"]
version_count: 3
action_count: 17
vote_count: 2
first_action: "2024-01-25"
last_action: "2024-05-09"
source: "openstates"
source_identifier: "ocd-bill/196aa7ff-9e5a-41b4-972a-1cddaa237159"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/sb0570?ys=2024RS&search=True"
source_hash: "9b16769fb2345085bd125281925f619c58f51e3049c07fb12da98e7466ef871b"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-md"]
---

# Maryland SB 570 (2024) — Public Utilities - Thermal Energy Network Systems - Authorization and Establishment (Working for Accessible Renewable Maryland Thermal Heat (WARMTH) Act)

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Chapter - Public Utilities - Thermal Energy Network Systems - Authorization and Establishment (Working for Accessible Renewable Maryland Thermal Heat (WARMTH) Act)** (committee substitute) — [source](http://mgaleg.maryland.gov/2024RS/Chapters_noln/CH_563_sb0570t.pdf)
2. **First - Public Utilities - Thermal Energy Network Systems - Authorization and Establishment (Working for Accessible Renewable Maryland Thermal Heat (WARMTH) Act)** (committee substitute) — [source](http://mgaleg.maryland.gov/2024RS/bills/sb/sb0570f.pdf)
3. **Third - Public Utilities - Thermal Energy Network Systems - Authorization and Establishment (Working for Accessible Renewable Maryland Thermal Heat (WARMTH) Act)** (committee substitute) — [source](http://mgaleg.maryland.gov/2024RS/bills/sb/sb0570t.pdf)

## Votes

- On Third Reading — **36–7** (pass) · upper
- On Third Reading — **101–34** (pass) · lower

## Sponsors

- Hester — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2024-01-25** First Reading Education, Energy, and the Environment `referral-committee`
- **2024-01-26** Hearing 2/15 at 1:00 p.m.
- **2024-02-06** Hearing canceled
- **2024-02-06** Hearing 2/29 at 1:00 p.m.
- **2024-03-29** Favorable with Amendments Report by Education, Energy, and the Environment `committee-passage-favorable`
- **2024-03-29** Favorable with Amendments { `committee-passage-favorable`
- **2024-03-29** Motion Laid Over (Senator Hershey) Adopted
- **2024-04-01** Favorable with Amendments { `committee-passage-favorable`
- **2024-04-01** Second Reading Passed with Amendments
- **2024-04-02** Third Reading Passed `passage`
- **2024-04-02** Referred Rules and Executive Nominations `referral-committee`
- **2024-04-05** Rereferred to Economic Matters
- **2024-04-08** Favorable Report by Economic Matters `committee-passage-favorable`
- **2024-04-08** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2024-04-08** Third Reading Passed `passage`
- **2024-04-08** Returned Passed
- **2024-05-09** Approved by the Governor - Chapter 563 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/196aa7ff-9e5a-41b4-972a-1cddaa237159`. Confidence: reported (aggregated from official Maryland legislature records).