As per the Library of Congress, Copyright Office Web Site:
"A party may seek to protect his or her copyrights against unauthorized use by filing a civil lawsuit in federal district court. If you believe that your copyright has been infringed, consult an attorney. In cases of willful infringement for profit, the U.S. Attorney may initiate a criminal investigation."
"Uploading or downloading works protected by copyright without the authority of the copyright owner is an infringement of the copyright owner's exclusive rights of reproduction and/or distribution. Anyone found to have infringed a copyrighted work may be liable for statutory damages up to $30,000 for each work infringed and, if willful infringement is proven by the copyright owner, that amount may be increased up to $150,000 for each work infringed. In addition, an infringer of a work may also be liable for the attorney's fees incurred by the copyright owner to enforce his or her rights.
Whether or not a particular work is being made available under the authority of the copyright owner is a question of fact. But since any original work of authorship fixed in a tangible medium (including a computer file) is protected by federal copyright law upon creation, in the absence of clear information to the contrary, most works may be assumed to be protected by federal copyright law."
Note that in the above, damages may be for 'each work', which in the case of a web site means each and every item of originally produced content, such as each graphic, custom text items, and so forth. This may amount to dozens of items considered as individual 'works'.