---
type: "Bill"
title: "Water Pollution - Stormwater Management Regulations and Watershed Implementation Plans - Review and Update"
description: "Water Pollution - Stormwater Management Regulations and Watershed Implementation Plans - Review and Update"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2021"
identifier: "SB 227"
citation: "Maryland SB 227 (2021)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Elfreth", "Hester", "Pinsky"]
version_count: 4
action_count: 16
vote_count: 3
first_action: "2020-11-01"
last_action: "2021-05-30"
source: "openstates"
source_identifier: "ocd-bill/63aedcf7-6277-4adc-89df-5b1f421efeef"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/sb0227?ys=2021RS&search=True"
source_hash: "92efbf58b30599f42971cebab91754f17b470ae7ac3a91c08fae64f602bfff11"
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 227 (2021) — Water Pollution - Stormwater Management Regulations and Watershed Implementation Plans - Review and Update

## Version chain

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

1. **Chapter - Water Pollution - Stormwater Management Regulations and Watershed Implementation Plans - Review and Update** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/Chapters_noln/CH_641_sb0227e.pdf)
2. **Enrolled - Water Pollution - Stormwater Management Regulations and Watershed Implementation Plans - Review and Update** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/sb/sb0227e.pdf)
3. **First - Water Pollution - Stormwater Management Regulations and Watershed Implementation Plans - Review and Update** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/sb/sb0227f.pdf)
4. **Third - Water Pollution - Stormwater Management Regulations and Watershed Implementation Plans - Review and Update** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/sb/sb0227t.pdf)

## Votes

- On Third Reading (Amend) — **95–40** (pass) · lower
- On Third Reading — **47–0** (pass) · upper
- On third reading — **45–0** (pass) · upper

## Sponsors

- Elfreth — primary (person)
- Hester — primary (person)
- Pinsky — primary (person)

## Timeline

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

- **2020-11-01** Pre-filed `introduction`
- **2021-01-13** First Reading Education, Health, and Environmental Affairs `referral-committee`
- **2020-12-29** Hearing 1/21 at 11:00 a.m.
- **2021-02-09** Favorable with Amendments Report by Education, Health, and Environmental Affairs `committee-passage-favorable`
- **2021-02-09** Favorable with Amendments { `committee-passage-favorable`
- **2021-02-09** Second Reading Passed with Amendments
- **2021-02-10** Third Reading Passed `passage`
- **2021-02-11** Referred Environment and Transportation `referral-committee`
- **2021-04-05** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2021-04-05** Favorable with Amendments { `committee-passage-favorable`
- **2021-04-05** Second Reading Passed with Amendments
- **2021-04-06** Third Reading Passed `passage`
- **2021-04-07** Senate Concurs House Amendments
- **2021-04-07** Third Reading Passed `passage`
- **2021-04-07** Passed Enrolled
- **2021-05-30** Enacted under Article II, Section 17(c) of the Maryland Constitution - Chapter 641 `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/63aedcf7-6277-4adc-89df-5b1f421efeef`. Confidence: reported (aggregated from official Maryland legislature records).