Do you really mean Chloride Ions or chlorine? The latter can be reduced with thiosulfate according to a Standard method.

For chloride ions we use a method based on UHLA (Ultra high lime alluminate) process. It is based on the crystallization of calcium chloride alluminate by the additivation of lime and Na-aluminate

There is an alternative method. If you pass air through the water, each bubble will help strip out the chloride ions. If you heat the water up, this can help too. If you have a source of organic material in this aqueous solution, you will create THMs. The bubbling and heat will help the THMS form and get scrubbed out of solution. This is similar to using a Hot Tub.

Ascorbic acid (a reducing agent) is used to quench chlorine (an oxidant) from water drinking water samples. Alternative quencing agents used for this are thiosulfate or ammonium chloride. Each of those has advantages and disadvantages depending for which analytes you are sampling.

If you want to reduce chlorine concentration in large volumes of water, air stripping is usually recommended.

If you are referring to reducing the chloride ion concentration, I think the only realistic alternative is ion exchange, but that may change other water characteristics (pH; taste), depending on the ion used in the exchange. For large volumes of water, dilution may be the only realistic possibility.

If you define the problem better, we may be able to give more precise answers.

You can use any of the water filtration methods like Reverse Osmosis or demineralisation using ion exchange resins to remove chloride ions from water. Although they might have high initial cost but they will be cheaper in longer run. pH and TDS both will be decreased in these methods. Also if your requirement is low you can use any domestic RO which arent very expensive.

And if chlorine is to be removed a simple activated carbon filter will do the trick without affecting pH or TDS.