Sparrow Island, located along the Brockville Waterfront, features a shallow bay on its north side characterised by unique rock ledges and aquatic vegetation. This freshwater site is suitable for intermediate divers and snorkellers, with depths ranging from 2 to 14 metres and an average depth of 8 metres. The area experiences strong currents and varying visibility between 5 and 10 metres. Divers and snorkellers should remain aware of boat traffic in the vicinity. The habitat supports a variety of temperate freshwater fish and invertebrates typical of the region. Access to the site is available via both shore and boat entries.

Molly's Gut is a narrow inlet located along the Brockville Waterfront. This site is characterised by calm waters and features a shallow, unidentified shipwreck. The area provides a sheltered environment that differs from the main river channel, making it a suitable location for beginner snorkellers. Access to the water is possible from both the shore and by boat. Due to its protected nature, the site is well-suited for quiet exploration of the underwater topography and the remains of the wreck.

The Henry C. Daryaw is a shipwreck lying at depths of 27 to 29 metres off the Brockville Waterfront. This freshwater site requires boat access and is suited for advanced divers with wreck certification. The wreck presents a full overhead environment, necessitating precise buoyancy control and navigation skills. Divers must manage strong currents that can shift direction unexpectedly. Visibility typically ranges from 10 to 30 metres, though conditions vary. Due to the depth and overhead nature of the wreck, carrying a torch and a surface marker buoy is standard practice. Guided tours are available and recommended for those visiting the site for the first time.

Cunningham Park is a freshwater artificial reef located along the Brockville Waterfront. The site features a renovated seawall with a dedicated ladder for shore entry, making it accessible for beginners. Divers and snorkellers can explore depths ranging from 2 to 15 metres, with an average depth of 8 metres. Visibility in the St. Lawrence River typically spans 12 to 30 metres. During summer months, water temperatures range between 20 and 24 degrees Celsius. While the site is suitable for snorkelling, users should remain aware of boat traffic in the area. The breakwater structure provides a sheltered environment for underwater exploration.

The Robert Gaskin is an 1863 double-masted wooden barge resting in the St. Lawrence River. Measuring 113 feet by 26 feet, the vessel features a square stern and sits on a firm bottom with light silt. The wreck lies with its bow facing inland, with depths ranging from 17 to 21 metres. Divers typically encounter a mild current across the deck. Located 450 metres from shore, the site is situated near the main shipping channel, necessitating caution due to boat traffic. Entry is possible from both shore and boat. Visibility at the site fluctuates between 5 and 15 metres, and the wreck is suitable for intermediate divers.

Centeen Memorial Dive Park is a freshwater artificial reef located along the Brockville Waterfront. Designed specifically for training, the site features three underwater platforms and various sculptures. Divers can explore depths between 3 and 13 metres, with an average depth of 10 metres. The site offers convenient shore entry and is suitable for beginners, provided they stay within the park boundaries to avoid stronger currents. Visibility typically ranges from 5 to 15 metres, and water temperatures remain consistent from the surface to the bottom. On-site facilities include parking, toilets, showers, and nearby access to air fills.

Muscallonge is a freshwater wreck dive located 91 metres off the Brockville Waterfront. Resting at depths between 27 and 32 metres, this site is suited for intermediate divers due to the significant depth and strong currents. Visibility at the site varies between 10 and 30 metres. Access is by boat only, and divers must remain vigilant regarding heavy boat traffic in the area. Given the challenging conditions and potential for entanglement, a surface marker buoy is strongly recommended. Guided tours are available through local dive shops, and a site briefing is essential to manage the currents and depth safely.

American is a drift dive located in the St. Lawrence River. The site maintains a consistent depth of 9 metres, making it manageable for divers to monitor their position. Access is by boat, and the site is characterised by strong currents that require careful planning of the drift path and pickup arrangements. Visibility typically ranges between 5 and 10 metres. Due to the cold water temperatures, adequate thermal protection is essential for all divers. Divers should be prepared for the current to carry them away from the entry point and should confirm all boat logistics locally before entering the water.