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Estuario Weekly Update

An estuarine greeting! Through our weekly update, we report about events, projects, activities and training opportunities for residents and friends of the communities of the watershed of the San Juan Bay estuary. 

International Mother Earth Day 2023

Celebrate the International Mother Earth Day with us, this coming Saturday, April 22, from 9:00 a.m. to 11:00 a.m. at the Piñones State Forest. During this activity, we will discuss the importance of urban forests and their biodiversity. This activity counts for Green Contact hours. Limited spaces.

We will also have a mangrove planting with Surfrider Foundation Puerto Rico, from 8:00 a.m. to 12:00 p.m. in Playa Jobos, Isabela, as part of the coastal resilience theme module of our Scientific Citizens Certification Program.

See all the events and register today, at

Workshop for teachers and non-formal educators

The San Juan Bay Estuary Program, in collaboration with Birds Caribbean, will be offering a workshop for teachers and non-formal educators of the SJBE basin (Bayamón, Carolina, Cataño, Guaynabo, Loíza, San Juan, Toa Baja and Trujillo Alto).

This will be offered on Sunday, April 23, 2023, from 9:00 a.m. to 1:00 p.m. at the Piñones State Forest Visitor Center. The workshop will present the importance of urban forests for land birds, techniques to identify and document birds and various activities to educate about birds.

Sign up at

Certification for citizen scientists

Join us for the following activities scheduled as part of the coastal resilience thematic module of Estuario’s Certification for Citizen Scientists Program:

  • Thematic workshop: seafood restoration – Tuesday, April 18, 2023, 7:00 p.m. – 8:00 p.m. by Zoom
  • Field trip: marine herb monitoring – Sunday, April 23, 2023, 8:00 p.m. – 12:00 p.m., Condado Lagoon

We will soon be announcing dates for a new round of introductory workshops for all the thematic modules. Sign up at

Fifteenth Puerto Rico Water Quality Day Successfully Concludes

Last Saturday, April 1, 2023, the fifteenth Water Quality Day of Puerto Rico was held. Thank you for making this the largest participatory science event on the Island!

Read our note for the event, see the photo gallery and lists of participants, collaborators and sponsors, here.

Weekly water quality monitoring

Evaluation carried out on Thursday, April 13, 2023. We have a GREEN flag in the Condado Lagoon Natural Estuarine Reserve. The map identifies the stations that exceeded the water quality parameter for enterococci (70 CFU/100mL). We recommend avoiding direct contact with these bodies of water during rain events.

The actions for the restoration and management of bodies of water within the San Juan Bay Estuary Watershed are possible thanks to the public. Donations to the San Juan Bay Estuary Program are deductible from Puerto Rico and US tax returns.

For more info, go to

Follow us on social media, where we share information on activities which will contribute to your knowledge and personal and professional development. If you have any doubts or questions, please contact us through [email protected].

Register as a volunteer, HERE.

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