The eight members, each serving in the House of Representatives, had expressed concerns that Google was violating a 2010 settlement it had agreed to in the wake of the disastrous Buzz launch.
In its letter, Google maintained it was not planning to repeal any existing privacy settings and that users will be able to keep any private data from public view under the new policy.
"However, we have built meaningful privacy controls into our products, and we are committed to continue offering those choices in the future."
The company maintained that all existing privacy settings will be retained under the new policy, which consolidates all privacy plans for Google sites and services into a single, blanket policy.
It added that no additional data will be collected under the new plan, and no user data will be sold to third parties.
In a posting to the company's Public Policy blog, Google director for public policy Pablo Chavez said the aim of the plan was to make the company's policy clearer for users.
"We are trying to make them simpler and more understandable, which is something that lawmakers and regulators have asked technology companies to do," Chavez said.
"By folding more than 60 product-specific privacy policies into our main Google one, we are explaining our privacy commitments to users of those products in 85 per cent fewer words."
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