On Friday, the NSW government released a water quality report for beaches across the state, urging swimmers to check before they go swimming.

Pollution warnings were issued for beaches in Cronulla, Botany and north Sydney on the Beachwatch website.

Beaches across Sydney, including Gymea Bay, Malabar Beach, Monterey Baths, Carrs Park Baths, Frenchmans Bay and Gunnamatta Bay Baths, were issued cautions a day after the report was released.

“Water quality usually suitable for swimming, but young children, the elderly, or those with compromised health may be at increased risk,” the warning read.

Avoca, Parramatta River, Sailors Bay and Sandy Bay were also affected.

"Caution advised for swimming. Water quality usually suitable for swimming, but young children, elderly or those with compromised health may be at increased risk," the warning read.

Bronte and Coogee beaches were also declared safe on Monday after they were tested for faecal matter.

There are many risks associated with swimming in contaminated water.

“Contamination of recreational waters with faecal material from animal and human sources can pose significant health problems to beach users owing to the presence of pathogens (disease-causing microorganisms) in the faecal material,” the report stated.

“The most common groups of pathogens found in recreational waters are bacteria, protozoans and viruses.

“Exposure to contaminated water can cause gastroenteritis, with symptoms including vomiting, diarrhoea, stomachache, nausea, headache and fever.

“Eye, ear, skin and upper respiratory tract infections can also be contracted when pathogens come into contact with small breaks and tears in the skin or ruptures of the delicate membranes in the ear or nose.”

The Bureau of Meteorology is also encouraging swimmers to check water quality before diving in the water this summer, as they have predicted a wet summer for 2024-2025.

With AAP.