Company: MSEX
Filing Date: 2025-05-12
Form Type: 424B5
Source: 0001104659-25-047381
Chunk: 22

Company: MIDDLESEX WATER CO
Filing Date: 2025-05-12
Form: 424B5
Chunk 22
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., Washington, D.C. 20549. Please contact the SEC at (800) SEC-0330 for information on the operation of the Public Reference Room. In addition, our SEC filings are available to the public at the SEC’s Internet site at www.sec.gov and on our Internet site at
.

This prospectus supplement
constitutes part of a Registration Statement on Form S-3 that we filed with the SEC. This prospectus supplement does not contain
all of the information set forth in the Registration Statement, some parts of which are omitted in accordance with the rules and
regulations of the SEC. For further information, reference is hereby made to the Registration Statement and all amendments and exhibits
thereto.

<div align='center'>INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE</div>

The SEC allows us to incorporate
by reference the information and reports we file with it, which means that we can disclose important information to you by referring you
to these documents. The information incorporated by reference is considered to be a part of this prospectus supplement and the accompanying
prospectus, except for information incorporated by reference that is modified or superseded by information contained in this prospectus
supplement or in any other subsequently filed document that also is incorporated by reference herein. Information we file later with the
SEC will automatically update and supersede the information in this Prospectus Supplement and in documents incorporated by reference.
We incorporate by reference the documents listed below:

| (f) | All documents filed by the Company after the date of this prospectus supplement pursuant to Sections 13(a),                               
 13(c), 14 and 15(d) of the Exchange Act prior to the termination of the offering of the securities covered by this prospectus supplement, 
 except as to any portion of any future report or document that is not deemed filed under such provisions.                                 |

<div align='center'>S-18</div>

Upon request, we will provide,
without charge, to each person (including any beneficial owner) to whom a copy of this prospectus is delivered, a copy of the documents
incorporated by reference into this prospectus. You may request a copy of these filings, and any exhibits we have specifically incorporated
by reference as an exhibit in this prospectus, at no cost by writing or telephoning us at the following:

Middlesex Water Company 485C Route 1 South, Suite 400, Iselin,
New Jersey 08830, 732- 634-150