In the 2030 Agenda, drawn up by the United Nations (UN), which Objective 11 addresses inclusive, safe, resilient and sustainable cities. One goals is disaster risk reduction. Thus, the charter of technological risks is an important tool for planning the territory, aimed at preventive actions, mitigation and responses to reduce or even avoid disasters. In this context this research aimed at technological risk mapping in the city of Maringa, Parana. This has been done mainly by secondary data, in which the research was developed in three steps (I - Pre-geoprocessing; II - Geo-processing, and III - Post-geoprocessing). Stage I for gathering existing data; Stage II for analysis of data obtained and drafting of cartographic documents, and Stage III for local reality check. We have also employed data from chemical / industrial, nuclear and radiological activities and, transport enterprises. Results have shown that mapmaking has enabled the verification of areas of greatest technological risk in the city, being in industry, near roads, railways and airports, but also in the centre of town, due to the rail tunnel. The technological risk chart can aid urban planning and in contingency plans pursuant to current international and national regulations, striving for prevention and mitigation of technological disasters.