---
schema_version: "secwatch.filing_event.v1"
accession: "0001174947-23-000789"
form_type: "8-K"
ticker: "MSEX"
cik: "0000066004"
company_name: "MIDDLESEX WATER CO"
filed_at: "2023-05-15T23:59:59+00:00"
generated_at: "2026-06-15T01:44:50.495189+00:00"
event_type: "regulatory"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Middlesex Water files for $33.9M (31.23%) base rate increase with NJ BPU

## Summary
- Requests $33.9M annual base rate increase (31.23%) for the Middlesex system; residential customer bill would rise ~$20.22/month.
- Since May 2021, invested $136M in Water for Tomorrow program covering GAC PFAS treatment, main replacements, and WQAA compliance.
- Two additional filings: a Lead Service Line Replacement cost-recovery plan and a Foundational Filing for a Distribution System Improvement Charge.
- NJBPU review includes public hearings; base rate process expected to take at least nine months.
- CEO cites regulatory compliance, workforce expansion, and system resiliency as drivers of the request.

## SEC filing metadata
- accession: 0001174947-23-000789
- form_type: 8-K
- ticker: MSEX
- cik: 0000066004
- company_name: MIDDLESEX WATER CO
- filed_at: 2023-05-15T23:59:59+00:00
- event_type: regulatory
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/66004/000117494723000789/0001174947-23-000789-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/66004/000117494723000789/form8k-30214_msx.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001174947-23-000789
- JSON: https://secwatch.observer/filing/0001174947-23-000789.json
- Plain text: https://secwatch.observer/filing/0001174947-23-000789.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.