WebMapping Information System to capture and visualize information related with Harmful algae blooms that affect fishery products, public health and the economy of El Salvador.  The main goal of this project is to determine toxin levels quickly and accurately to provide early warnings of toxicity levels of algae blooms to local fisherman, reducing the risk to food safety and ensuring that toxic seafood does not make its way into the human food chain. This webmapping Information System depends on the information collected from a network of monitoring stations located in the fishing parks of El Salvador, for the monitoring and control of problems related to toxicity. Samples from the monitoring stations are brought to the Laboratory facility for analysis and then the information is stored in the system so that people from different localities can visualize this information including warnings of toxicity, news and a map with the information related to every monitoring station. This project was implemented with Open Source software such as Linux Debian Operating System, Apache web server, Mapserver, Openlayers, Mapfish, PHP and PostgreSQL. Also it is used WMS service to get information from others servers and visualize it through our system like Google Earth imagery and Clorofila satellite images provided by CHATALAC in Panama.