BELMAR - Health officials found high levels of bacteria that could make people sick in the water at many beaches in New Jersey.

News 12 New Jersey discovered some beachgoers had no idea what they were swimming in.

A lifeguard at Hancock Avenue Bay beach in Seaside Heights told News 12 New Jersey that someone from the Department of Environmental Protection (DEP) alerted them about high bacteria counts prompting a second round of tests before the beach could be closed, yet no signs were posted letting beachgoers know they were swimming at their own risk.

The state says colonies of the bacteria are safe at a 104 level, but the bay beach in Seaside Heights came in yesterday at 230, more than double the bacteria allowed.

For a complete list of beaches with high bacteria levels this week, visit Karla Bardinas' blog and Facebook page.