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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 HOSVD1iy3pTNRqsFx7vWw6Dlb3rYyGVqdhAnF08+S9PsRhHA/NXxhXfH7pJObi+D
 fgtE1neabVWrvNxCYnpTdw==

<SEC-DOCUMENT>9999999995-10-001561.txt : 20100520
<SEC-HEADER>9999999995-10-001561.hdr.sgml : 20100520
<ACCEPTANCE-DATETIME>20100520001517
ACCESSION NUMBER:		9999999995-10-001561
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20100519
DATE AS OF CHANGE:		20100520
EFFECTIVENESS DATE:		20100519

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MIDDLESEX WATER CO
		CENTRAL INDEX KEY:			0000066004
		STANDARD INDUSTRIAL CLASSIFICATION:	WATER SUPPLY [4941]
		IRS NUMBER:				221114430
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-166425
		FILM NUMBER:		10846599

	BUSINESS ADDRESS:	
		STREET 1:		1500 RONSON RD
		STREET 2:		P O BOX 1500
		CITY:			ISELIN
		STATE:			NJ
		ZIP:			08830
		BUSINESS PHONE:		7326341500

	MAIL ADDRESS:	
		STREET 1:		1500 RONON ROAD
		CITY:			ISELIN
		STATE:			NJ
		ZIP:			08830
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2010-05-19</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>17:00:00</finalEffectivenessDispTime>
        <form>S-3</form>
        <filer>
            <cik>0000066004</cik>
            <entityName>MIDDLESEX WATER CO</entityName>
            <fileNumber>333-166425</fileNumber>
        </filer>
    </effectiveData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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