---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-24-095586"
form_type: "8-K"
ticker: "MSEX"
cik: "0000066004"
company_name: "MIDDLESEX WATER CO"
filed_at: "2024-08-30T23:59:59+00:00"
generated_at: "2026-05-31T06:53:35.453853+00:00"
event_type: "regulatory"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Tidewater Utilities files $10.3M rate increase request after decade-long pause

## Summary
- Tidewater (MSEX subsidiary) filed with Delaware PSC for $10.3 million annual revenue increase.
- Since last rate filing over 10 years ago, invested over $150M in critical water infrastructure.
- Average residential bill would rise ~$13.97/month for 5,000-gallon usage if approved.
- Improvements include new 1M-gallon tanks, backup generation at 30+ sites, and treatment upgrades.

## SEC filing metadata
- accession: 0001104659-24-095586
- form_type: 8-K
- ticker: MSEX
- cik: 0000066004
- company_name: MIDDLESEX WATER CO
- filed_at: 2024-08-30T23:59:59+00:00
- event_type: regulatory
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/66004/000110465924095586/0001104659-24-095586-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/66004/000110465924095586/tm2423117d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-24-095586
- JSON: https://secwatch.observer/filing/0001104659-24-095586.json
- Plain text: https://secwatch.observer/filing/0001104659-24-095586.txt

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