All data

Case filing and other case activity for each Trial Court department from FY 2002 through FY 2024.

Data on cases held in the Appeals Court, including source and type of appeal, dispositions, and the number of panel decisions. Data is available going back to Fiscal Year 2012 (July 1, 2011 - June 30, 2012). This page was last updated: August 2025. A note about the fiscal year: Massachusetts fiscal years run from July 1 of the previous calendar year through June 30 of the named year. For example, FY 2024 covers July 1, 2023 – June 30, 2024.

Applications for delinquent complaint filed in the Massachusetts Juvenile Court. If a youth is suspected of committing a delinquent offense, a police officer may arrest the youth or give them a summons to appear at the Juvenile Court. In either case, the officer files an application for delinquent complaint with the court. This data is compiled and updated annually by the Massachusetts Trial Court Department of Research and Planning.

This data describes mosquito-borne illnesses in Massachusetts by county, city, and town. You can also download a risk management plan.

Annual network plan archive for the MassDEP statewide air monitoring network

Download reports from the Massachusetts Department of Public Health (DPH).

Data on vaccination and exemption rates from school immunization surveys of childcare/preschool, kindergarten, grade 7, grade 11, and college.

Use these archived reports to find information on medically-treated and fatal injuries to MA residents.

Report of a 2009 study on the presence of arsenic and uranium in drinking water wells in eastern Massachusetts.

Download data about asbestos removal projects in Massachusetts. You can filter your search by project ID, location, type, and date. This dataset is hosted in the Energy & Environmental Affairs Data Portal, an open data hub for state environmental data.