---
type: "Bill"
title: "Storm water management."
description: "Provides that a unit does not have the power to adopt a law, rule, ordinance, or regulation that is more stringent than or exceeds in any manner the requirements of the department of environmental management's (IDEM) construction stormwater general permit (CSGP). Provides that if a law, rule, ordinance, or regulation is more stringent than or exceeds the CSGP, then: (1) the law, rule, ordinance, or regulation is void; and (2) the unit must continue to discharge its duties under IDEM's CSGP program. Provides that a unit or IDEM may under certain circumstances: (1) issue a written warning to a person engaging in land disturbing activities; and (2) issue a stop work order for the site. Makes conforming changes."
jurisdiction: "us/states/in"
legislature: "Indiana General Assembly"
session: "2025"
identifier: "HB 1037"
citation: "Indiana HB 1037 (2025)"
classification: ["bill"]
subjects: ["AGENCIES; Department of Environmental Management (IDEM)", "ENVIRONMENT; Drains and Drainage", "LOCAL GOVERNMENT; Generally", "UTILITIES; Municipal Utilities"]
status: "enacted"
primary_sponsors: ["Blake Doriot", "Doug Miller", "Linda Rogers"]
version_count: 4
action_count: 22
vote_count: 3
first_action: "2025-01-08"
last_action: "2025-05-01"
source: "openstates"
source_identifier: "ocd-bill/020fd567-c545-4272-bf1f-583846e7ddc5"
source_url: "https://api.iga.in.gov/2025/bills/hb1037"
source_hash: "1c1d7c219722aefad0c79da17583f716bdf3dc7535e2fef5ad9355a0625b8f0a"
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-in"]
---

# Indiana HB 1037 (2025) — Storm water management.

Provides that a unit does not have the power to adopt a law, rule, ordinance, or regulation that is more stringent than or exceeds in any manner the requirements of the department of environmental management's (IDEM) construction stormwater general permit (CSGP). Provides that if a law, rule, ordinance, or regulation is more stringent than or exceeds the CSGP, then: (1) the law, rule, ordinance, or regulation is void; and (2) the unit must continue to discharge its duties under IDEM's CSGP program. Provides that a unit or IDEM may under certain circumstances: (1) issue a written warning to a person engaging in land disturbing activities; and (2) issue a stop work order for the site. Makes conforming changes.

## Version chain

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

1. **Enrolled House Bill (H)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/house/bills/HB1037/HB1037.04.ENRS.pdf)
2. **House Bill (H)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/house/bills/HB1037/HB1037.03.COMS.pdf)
3. **House Bill (S)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/house/bills/HB1037/HB1037.02.COMH.pdf)
4. **Introduced House Bill (H)** (committee substitute) — [source](https://iga.in.gov/pdf-documents/124/2025/house/bills/HB1037/HB1037.01.INTR.pdf)

## Votes

- HB 1037 - Miller D - 3rd Reading — **65–24** (pass) · lower
- HB 1037 - Miller D — **68–20** (pass) · lower
- HB 1037 - Doriot - 3rd Reading — **31–18** (pass) · upper

## Sponsors

- Blake Doriot — primary (person)
- Doug Miller — primary (person)
- Linda Rogers — primary (person)

## Timeline

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

- **2025-01-08** Authored by Representative Morrison
- **2025-01-08** First reading: referred to Committee on Environmental Affairs `reading-1, referral-committee`
- **2025-01-09** Representative Morrison removed as author
- **2025-01-09** Representative Miller D added as author
- **2025-01-30** Committee report: do pass, adopted `committee-passage`
- **2025-02-03** Second reading: ordered engrossed `reading-2`
- **2025-02-04** Third reading: passed; Roll Call 77: yeas 65, nays 24 `passage, reading-3, reading-3`
- **2025-02-04** Senate sponsor: Senator Doriot
- **2025-02-05** Referred to the Senate `referral`
- **2025-02-18** First reading: referred to Committee on Environmental Affairs `reading-1, referral-committee`
- **2025-04-07** Senator Rogers added as second sponsor
- **2025-04-08** Committee report: amend do pass, adopted `committee-passage`
- **2025-04-10** Second reading: ordered engrossed `reading-2`
- **2025-04-15** Third reading: passed; Roll Call 425: yeas 31, nays 18 `passage, reading-3, reading-3`
- **2025-04-16** Motion to concur filed `filing`
- **2025-04-16** Returned to the House with amendments `receipt`
- **2025-04-17** House concurred with Senate amendments; Roll Call 479: yeas 68, nays 20
- **2025-04-21** Signed by the Speaker `passage`
- **2025-04-22** Signed by the President Pro Tempore `passage`
- **2025-04-23** Signed by the President of the Senate `passage`
- **2025-05-01** Public Law 150 `became-law`
- **2025-05-01** Signed by the Governor `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/020fd567-c545-4272-bf1f-583846e7ddc5`. Confidence: reported (aggregated from official Indiana legislature records).