---
type: "Bill"
title: "St. Mary’s County – County Plans – Public Sewerage Systems and Water Supply Systems"
description: "St. Mary’s County – County Plans – Public Sewerage Systems and Water Supply Systems"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2025"
identifier: "HB 480"
citation: "Maryland HB 480 (2025)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["St. Mary's County Delegation"]
version_count: 3
action_count: 17
vote_count: 1
first_action: "2025-01-20"
last_action: "2025-05-13"
source: "openstates"
source_identifier: "ocd-bill/1e912d8c-ed3c-4263-8fdb-5810cf49e796"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/hb0480?ys=2025RS&search=True"
source_hash: "c0457a7af3b54e6c92c790737147c278ad7548a4509c39f18cec43eff84456ee"
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 HB 480 (2025) — St. Mary’s County – County Plans – Public Sewerage Systems and Water Supply Systems

## Version chain

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

1. **Chapter - St. Mary’s County – County Plans – Public Sewerage Systems and Water Supply Systems** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/Chapters_noln/CH_598_hb0480t.pdf)
2. **First - St. Mary’s County – County Plans – Public Sewerage Systems and Water Supply Systems** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/hb/hb0480f.pdf)
3. **Third - St. Mary’s County – County Plans – Public Sewerage Systems and Water Supply Systems** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/hb/hb0480t.pdf)

## Votes

- On Third Reading — **138–0** (pass) · lower

## Sponsors

- St. Mary's County Delegation — primary (person)

## Timeline

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

- **2025-01-20** First Reading Environment and Transportation `referral-committee`
- **2025-01-27** Hearing 2/12 at 1:00 p.m.
- **2025-03-12** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2025-03-13** Favorable with Amendments { `committee-passage-favorable`
- **2025-03-13** Second Reading Passed with Amendments
- **2025-03-17** Third Reading Passed `passage`
- **2025-03-17** Referred Education, Energy, and the Environment `referral-committee`
- **2025-03-18** Hearing 4/01 at 1:00 p.m.
- **2025-04-01** Hearing canceled
- **2025-04-01** Hearing 4/01 at 1:30 p.m.
- **2025-04-01** Hearing canceled
- **2025-04-01** Hearing 4/01 at 3:30 p.m.
- **2025-04-03** Favorable Report by Education, Energy, and the Environment `committee-passage-favorable`
- **2025-04-03** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2025-04-04** Third Reading Passed `passage`
- **2025-04-05** Returned Passed
- **2025-05-13** Approved by the Governor - Chapter 598 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/1e912d8c-ed3c-4263-8fdb-5810cf49e796`. Confidence: reported (aggregated from official Maryland legislature records).