---
type: "Bill"
title: "Repeal numeric nutrient standards for water quality"
description: "Repeal numeric nutrient standards for water quality"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2021"
identifier: "SB 358"
citation: "Montana SB 358 (2021)"
classification: ["bill"]
subjects: ["Administrative Rules; Revision or Repeal", "Environmental Protection", "Rule Making", "Water"]
status: "enacted"
primary_sponsors: ["John Esp"]
version_count: 5
action_count: 57
vote_count: 9
first_action: "2020-11-08"
last_action: "2021-04-30"
source: "openstates"
source_identifier: "ocd-bill/1ee4e74e-097f-4333-82dc-1a40adb8a81b"
source_url: "http://laws.leg.mt.gov/legprd/LAW0210W$BSIV.ActionQuery?P_BILL_NO1=358&P_BLTP_BILL_TYP_CD=SB&Z_ACTION=Find&P_SESS=20211"
source_hash: "c9696eec937d47b52e23dace2cc4be6ca66d51d89b3100440768a5114c2b42e7"
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-mt"]
---

# Montana SB 358 (2021) — Repeal numeric nutrient standards for water quality

## Version chain

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

1. **SB0358_1.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/SB0399//SB0358_1.pdf)
2. **SB0358_2.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/SB0399//SB0358_2.pdf)
3. **SB0358_3.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/SB0399//SB0358_3.pdf)
4. **SB0358_X.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/SB0399//SB0358_X.pdf)
5. **Enrolled** (enrolled) — [source](https://leg.mt.gov/bills/2021/billpdf/SB0358.pdf)

## Votes

- BE CONCURRED IN AS AMENDED — **10–5** (pass) · lower
- Do Concur — **48–2** (pass) · upper
- Do Concur As Amended — **72–28** (pass) · lower
- Do Pass — **33–17** (pass) · upper
- AMD-001 Knudsen R D/PASS — **72–28** (pass) · lower
- Do Pass — **33–16** (pass) · upper
- Do Concur — **69–29** (pass) · lower
- DO PASS — **9–3** (pass) · upper
- Do Concur — **49–1** (pass) · upper

## Sponsors

- John Esp — primary (person)

## Timeline

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

- **2020-11-08** Draft Request Received
- **2021-01-18** Draft On Hold
- **2021-02-17** Draft Taken Off Hold
- **2021-02-17** Draft in Legal Review
- **2021-02-18** Draft in Edit
- **2021-02-20** Draft to Drafter - Edit Review
- **2021-02-21** Draft in Input/Proofing
- **2021-02-22** Draft in Final Drafter Review
- **2021-02-22** Bill Draft Text Available Electronically
- **2021-02-22** Executive Director Review
- **2021-02-23** Draft in Assembly
- **2021-02-23** Draft Ready for Delivery
- **2021-02-23** Executive Director Final Review
- **2021-02-23** Draft Ready for Delivery
- **2021-02-23** Draft Delivered to Requester
- **2021-02-23** Introduced `introduction`
- **2021-02-23** First Reading `reading-1`
- **2021-02-23** Referred to Committee - (S) Natural Resources `referral-committee`
- **2021-02-24** Introduced Bill Text Available Electronically
- **2021-02-24** Hearing - (S) Natural Resources
- **2021-02-24** Tabled in Committee - (S) Natural Resources `amendment-deferral`
- **2021-02-26** Taken from Table in Committee - (S) Natural Resources
- **2021-02-26** Committee Executive Action--Bill Passed - (S) Natural Resources `committee-passage`
- **2021-02-27** Committee Report--Bill Passed - (S) Natural Resources `committee-passage`
- **2021-03-01** Scheduled for 2nd Reading
- **2021-03-01** 2nd Reading Passed `reading-2`
- **2021-03-01** Scheduled for 3rd Reading
- **2021-03-02** 3rd Reading Passed `passage, reading-3`
- **2021-03-02** Transmitted to House
- **2021-03-08** Referred to Committee - (H) Natural Resources `referral-committee`
- **2021-03-08** First Reading `reading-1`
- **2021-03-29** Hearing - (H) Natural Resources
- **2021-04-01** Amendments Available
- **2021-04-01** Committee Executive Action--Bill Concurred as Amended - (H) Natural Resources
- **2021-04-06** Fiscal Note Requested
- **2021-04-07** Committee Report--Bill Concurred as Amended - (H) Natural Resources
- **2021-04-07** Printed - New Version Available
- **2021-04-09** Scheduled for 2nd Reading
- **2021-04-09** 2nd Reading Motion to Amend Carried
- **2021-04-09** 2nd Reading Concurred as Amended `reading-2`
- **2021-04-10** Printed - New Version Available
- **2021-04-13** Scheduled for 3rd Reading
- **2021-04-13** 3rd Reading Concurred `passage, reading-3`
- **2021-04-13** Returned to Senate with Amendments
- **2021-04-15** Scheduled for 2nd Reading
- **2021-04-15** 2nd Reading House Amendments Concurred `amendment-amendment, amendment-passage, reading-2`
- **2021-04-15** Fiscal Note Received
- **2021-04-15** 3rd Reading Passed as Amended by House `passage, reading-3`
- **2021-04-15** Sent to Enrolling
- **2021-04-20** Fiscal Note Printed
- **2021-04-21** Returned from Enrolling
- **2021-04-21** Printed - Enrolled Version Available
- **2021-04-23** Signed by President
- **2021-04-23** Signed by Speaker
- **2021-04-23** Transmitted to Governor `executive-receipt`
- **2021-04-30** Signed by Governor `executive-signature`
- **2021-04-30** Chapter Number Assigned `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/1ee4e74e-097f-4333-82dc-1a40adb8a81b`. Confidence: reported (aggregated from official Montana legislature records).