---
type: "Bill"
title: "A bill for an act relating to notice requirements prior to discontinuing fluoridation in a public water supply system. (Formerly HF 84.) Effective date: 07/01/2021."
description: "A bill for an act relating to notice requirements prior to discontinuing fluoridation in a public water supply system. (Formerly HF 84.) Effective date: 07/01/2021."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2021-2022"
identifier: "HF 390"
citation: "Iowa HF 390 (2021-2022)"
classification: ["bill"]
subjects: ["city government", "fluoridation", "notices", "water", "water quality"]
status: "enacted"
primary_sponsors: []
version_count: 8
action_count: 28
vote_count: 3
first_action: "2021-02-04"
last_action: "2021-05-18"
source: "openstates"
source_identifier: "ocd-bill/271fa3f9-d45d-4251-90cc-838db0358959"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=HF 390&ga=89"
source_hash: "12be0490847ef89071d976bff2d37a59dae55dbeb29a2e5cf797ad5bdac2299f"
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-ia"]
---

# Iowa HF 390 (2021-2022) — A bill for an act relating to notice requirements prior to discontinuing fluoridation in a public water supply system. (Formerly HF 84.) Effective date: 07/01/2021.

## Version chain

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

1. **Introduced** (filed) — [source](https://www.legis.iowa.gov/docs/publications/LGI/89/attachments/HF390.html)
2. **Amendment H-1040** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/89/H1040.pdf)
3. **Amendment H-1360** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/89/H1360.pdf)
4. **Amendment S-3123** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/89/S3123.pdf)
5. **Reprinted** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGR/89/attachments/HF390.html)
6. **Reprinted Marked Up** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGRM/89/attachments/HF390.html)
7. **Signed Enrolled Bill (PDF)** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGE/89/Attachments/HF390_GovLetter.pdf)
8. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/89/attachments/HF390.html)

## Votes

- Shall the bill pass? — **47–0** (pass) · upper
- Shall the bill pass? — **91–1** (pass) · lower
- Shall the bill pass? — **90–2** (pass) · lower

## Timeline

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

- **2021-02-04** Introduced, placed on calendar. `introduction`
- **2021-02-10** Amendment H-1040 filed. `amendment-introduction`
- **2021-02-16** Amendment H-1040 adopted. `amendment-passage`
- **2021-02-24** Explanation of vote.
- **2021-02-16** Passed House, yeas 91, nays 1. `passage`
- **2021-02-17** Explanation of vote.
- **2021-02-24** Explanation of vote.
- **2021-02-16** Immediate message.
- **2021-02-17** Message from House.
- **2021-02-17** Read first time, referred to Human Resources. `reading-1`
- **2021-02-23** Subcommittee: Johnson, Bolkcom, and Green.
- **2021-03-16** Subcommittee Meeting: 03/18/2021 8:30AM RM 111.
- **2021-03-18** Subcommittee recommends passage.
- **2021-03-23** Committee report, recommending passage. `committee-passage`
- **2021-04-06** Amendment S-3123 filed, adopted. `amendment-introduction, amendment-passage`
- **2021-04-06** Passed Senate, yeas 47, nays 0. `passage`
- **2021-04-06** Immediate message.
- **2021-04-07** Message from Senate.
- **2021-04-07** Senate amendment H-1360 filed.
- **2021-04-12** House concurred in Senate amendment H-1360.
- **2021-04-12** Passed House, yeas 90, nays 2. `passage`
- **2021-04-21** Explanation of vote.
- **2021-04-22** Explanation of vote.
- **2021-05-18** Explanation of vote.
- **2021-04-12** Immediate message.
- **2021-04-13** Message from House.
- **2021-04-30** Reported correctly enrolled, signed by Speaker and President, and sent to Governor.
- **2021-04-30** 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/271fa3f9-d45d-4251-90cc-838db0358959`. Confidence: reported (aggregated from official Iowa legislature records).