We’re only a few hours away from a number of coastal beaches, but if you want to the cleanest water possible, head to Delaware.

The First State ranked, well, first on the list of 30 states in terms of water cleanliness, according to the Natural Resources Defense Council. According to a report on beach water quality, only one percent of water samples taken from Delaware beaches in 2011 exceeded standards for the types of bacteria that could make you sick.

In other local beaches, Virginia came in sixth (four percent of samples) and Maryland eleventh (six percent of samples). The worst beaches in the country seem to be on Los Angeles and along the Great Lakes. The majority of the most dangerous bacteria comes from stormwater runoff, and can produce the following reactions in humans:

Illnesses associated with polluted beachwater include stomach flu, skin rashes, pinkeye, respiratory infections, meningitis, and hepatitis. Children are especially vulnerable, perhaps because they tend to submerge their heads more often than adults and are more likely to swallow water when swimming.

So, now you know—go to Delaware.