---
type: "Bill"
title: "Environment - Water Quality Testing - Secondary Maximum Contaminant Levels Action Plan"
description: "Environment - Water Quality Testing - Secondary Maximum Contaminant Levels Action Plan"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2026"
identifier: "SB 940"
citation: "Maryland SB 940 (2026)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Henson"]
version_count: 3
action_count: 16
vote_count: 2
first_action: "2026-02-06"
last_action: "2026-04-28"
source: "openstates"
source_identifier: "ocd-bill/45920688-b2f0-4092-b703-9ff5755179c1"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/sb0940?ys=2026RS"
source_hash: "d595c9bd677800140717626c3da31501c68f0cd2f31fdb893ef426ccad3ba1f1"
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 940 (2026) — Environment - Water Quality Testing - Secondary Maximum Contaminant Levels Action Plan

## Version chain

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

1. **Chapter - Environment - Water Quality Testing - Secondary Maximum Contaminant Levels Action Plan** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/Chapters_noln/CH_286_sb0940t.pdf)
2. **First - Environment - Mobile Home Parks - Water Quality Testing** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/bills/sb/sb0940f.pdf)
3. **Third - Environment - Water Quality Testing - Secondary Maximum Contaminant Levels Action Plan** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/bills/sb/sb0940t.pdf)

## Votes

- On Third Reading — **42–0** (pass) · upper
- On Third Reading — **119–16** (pass) · lower

## Sponsors

- Henson — primary (person)

## Timeline

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

- **2026-02-06** First Reading Education, Energy, and the Environment `referral-committee`
- **2026-02-10** Hearing 3/03 at 1:00 p.m.
- **2026-02-26** Hearing canceled
- **2026-02-26** Hearing 3/04 at 1:00 p.m.
- **2026-04-09** Favorable with Amendments Report by Education, Energy, and the Environment `committee-passage-favorable`
- **2026-04-09** Favorable with Amendments { `committee-passage-favorable`
- **2026-04-09** Second Reading Passed with Amendments
- **2026-04-09** Motion Special Order until Later Today (Senator King) Adopted
- **2026-04-09** Third Reading Passed `passage`
- **2026-04-10** Referred Rules and Executive Nominations `referral-committee`
- **2026-04-10** Rereferred to Environment and Transportation
- **2026-04-11** Favorable Report by Environment and Transportation `committee-passage-favorable`
- **2026-04-11** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2026-04-13** Third Reading Passed `passage`
- **2026-04-13** Returned Passed
- **2026-04-28** Approved by the Governor - Chapter 286 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/45920688-b2f0-4092-b703-9ff5755179c1`. Confidence: reported (aggregated from official Maryland legislature records).