<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2004-01-07</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000276209</issuerCik><issuerName>CONNECTICUT WATER SERVICE INC / CT</issuerName>        <issuerTradingSymbol>CTWS</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001217201</rptOwnerCik><rptOwnerName>ONEILL TERRANCE P</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>C/O CONNECTICUT WATER SERVICE, INC.</rptOwnerStreet1><rptOwnerStreet2>93 WEST MAIN STREET</rptOwnerStreet2><rptOwnerCity>CLINTON</rptOwnerCity><rptOwnerState>CT</rptOwnerState><rptOwnerZipCode>06413</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President, Operations</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common (restricted phantom)</value></securityTitle><transactionDate><value>2004-01-07</value></transactionDate><deemedExecutionDate><value>2004-01-07</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>439.0000</value></transactionShares><transactionPricePerShare><value>28.5100</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2133.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes></footnotes><remarks></remarks><ownerSignature><signatureName>/s/Michele G. DiAcri, POA for Terrance P. O'Neill</signatureName><signatureDate>2004-01-09</signatureDate></ownerSignature></ownershipDocument>

