---
type: "Bill"
title: "AN ACT CONCERNING MOLD IN RESIDENTIAL HOUSING AND COMMERCIAL BUILDINGS."
description: "AN ACT CONCERNING MOLD IN RESIDENTIAL HOUSING AND COMMERCIAL BUILDINGS."
jurisdiction: "us/states/ct"
legislature: "Connecticut General Assembly"
session: "2023"
identifier: "SB 959"
citation: "Connecticut SB 959 (2023)"
classification: ["bill"]
subjects: ["Advisory bodies", "Mold", "Public Health", "Department of", "Reports"]
status: "enacted"
primary_sponsors: ["Anwar, Saud", "Bumgardner, Aundre", "Cheeseman, Holly H.", "Delany, Hubert D.", "Michel, David", "Miller, Patricia Billie", "Sanchez, Emmanuel", "Santos, Farley", "Somers, Heather S."]
version_count: 5
action_count: 26
vote_count: 0
first_action: "2023-02-06"
last_action: "2023-06-13"
source: "openstates"
source_identifier: "ocd-bill/919a25c4-f305-4f5c-8c2c-061403e23b99"
source_url: "ftp://ftp.cga.ct.gov/pub/data/bill_info.csv"
source_hash: "89ed79a4ce7c65125b454e0f5305bf7b622c8a905ad96788c99190ddb8818dee"
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-ct"]
---

# Connecticut SB 959 (2023) — AN ACT CONCERNING MOLD IN RESIDENTIAL HOUSING AND COMMERCIAL BUILDINGS.

## Version chain

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

1. **APP Joint Favorable** (committee substitute) — [source](https://www.cga.ct.gov/2023/TOB/S/PDF/2023SB-00959-R02-SB.PDF)
2. **File No. 79** (committee substitute) — [source](https://www.cga.ct.gov/2023/FC/PDF/2023SB-00959-R000079-FC.PDF)
3. **PH Joint Favorable Substitute** (committee substitute) — [source](https://www.cga.ct.gov/2023/TOB/S/PDF/2023SB-00959-R01-SB.PDF)
4. **Public Act No. 23-42** (committee substitute) — [source](https://www.cga.ct.gov/2023/ACT/PA/PDF/2023PA-00042-R00SB-00959-PA.PDF)
5. **Raised Bill** (committee substitute) — [source](https://www.cga.ct.gov/2023/TOB/S/PDF/2023SB-00959-R00-SB.PDF)

## Sponsors

- Anwar, Saud — primary (person)
- Bumgardner, Aundre — primary (person)
- Cheeseman, Holly H. — primary (person)
- Delany, Hubert D. — primary (person)
- Michel, David — primary (person)
- Miller, Patricia Billie — primary (person)
- Sanchez, Emmanuel — primary (person)
- Santos, Farley — primary (person)
- Somers, Heather S. — primary (person)

## Timeline

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

- **2023-02-06** REF. TO JOINT COMM. ON Public Health `referral-committee`
- **2023-02-17** PUBLIC HEARING 0222
- **2023-03-03** Joint Favorable Substitute `committee-passage-favorable`
- **2023-03-06** FILED WITH LCO `filing`
- **2023-03-09** REFERRED TO Office of Legislative Research AND Office of Fiscal Analysis 03/14/23 `referral`
- **2023-03-15** RPTD. OUT OF LCO
- **2023-03-15** FAV. RPT., TAB. FOR CAL., SEN. `reading-2`
- **2023-03-15** SENATE CALENDAR NUMBER 75
- **2023-03-15** FILE NO. 79
- **2023-05-03** REF. BY SEN. TO COMM. ON Appropriations
- **2023-05-08** Joint Favorable `committee-passage-favorable`
- **2023-05-08** FILED WITH LCO `filing`
- **2023-05-09** RPTD. OUT OF LCO
- **2023-05-09** NO NEW FILE BY COMM. ON Appropriations
- **2023-05-09** FAV. RPT., TAB. FOR CAL., SEN. `reading-2`
- **2023-05-18** SEN. ADOPTED SEN. AMEND. SCH. A `amendment-passage`
- **2023-05-18** SEN. PASSED, SEN. AMEND. SCH. A `passage`
- **2023-05-19** FAV. RPT., TABLED FOR HOUSE CALENDAR `reading-2`
- **2023-05-19** HOUSE CALENDAR NUMBER 568
- **2023-06-01** HOUSE ADOPTED SEN. AMEND. SCH. A `amendment-passage`
- **2023-06-01** HOUSE PASSED, SEN. AMEND. SCH. A `passage`
- **2023-06-01** IN CONCURRENCE
- **2023-06-06** PUBLIC ACT 23-42
- **2023-06-07** TRANSMITTED TO SECRETARY OF THE STATE
- **2023-06-07** TRANSMITTED BY SECRETARY OF THE STATE TO GOVERNOR `executive-receipt`
- **2023-06-13** SIGNED BY GOVERNOR `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/919a25c4-f305-4f5c-8c2c-061403e23b99`. Confidence: reported (aggregated from official Connecticut legislature records).