These boundaries have been determined by CDA mostly though AAA, and Compass maps and corroborated via assessor ownership data. Occational updates use ownership data to pinpoint new purchases of land by owners of currently tracted features.

Emergency Medical Service ambulance dispatch incidents in Marin County, CA, for the period beginning March 1, 2013 through March 31, 2017. Data is updated quarterly. Data includes time stamps of events for each dispatch, nature of injury, and location of injury. Data also includes geocoding of most incident locations, however, specific street address locations are "obfuscated" and are generally shown within a block and are not, therefore, exact locations. Geocoding results are also based on the quality of the address information provided, and should therefore not be considered 100% accurate.

Some of the data may be interpreted incorrectly without adequate knowledge of the clinical context. Please contact EMS@marincounty.org if you have any questions about the interpretation of fields in this dataset.

Legal boundries of Marin County including embedded shoreline

Contains results of weekly water samples collected at beaches in Marin County, CA. The weekly samples are collected and analyzed for Total Coliform, E. coli, and Enterococcus bacteria. Advisories are posted at a beach when a recreational standard for these indicator organism is exceeded.

Weekly results are published each year starting in April and continuing through October. Sample results in this dataset start with the week of May 29, 2017.

If a sample result is labeled "N/A" it means that no results are available from the beach location that week.

Reported crimes of the Marin County Sheriff's Department. Data is updated every four hours. Data begins as of January 1, 2013. Each reported crime includes its date/time, approximate location, crime type, and crime classification.

NOTE: For the safety and security of victims of crimes, street address locations, other than reported street intersections or highway locations, are not exact. They are adjusted to the nearest block level.

There are two columns of city/town information. The first is the reported city/town name in the crime records. The second, which is not in the crime records, is a translation of it into the more commonly known city/town name, or into Marin County when it appears to be in an unincorporated area. For example, Almonte and Tam Valley are reported city/town names, but they are both in the more commonly known city of Mill Valley. Lucas Valley translates to San Rafael, etc. We hope that the translated city/town column will facilitate analysis.

Reported incidents of the Marin County Sheriff's Department. Data is updated every four hours. Data begins as of January 1, 2013. Each reported crime includes its date/time, approximate location, crime type, and crime classification.

NOTE: For the safety and security of victims of crimes, street address locations, other than reported street intersections or highway locations, are not exact. They are adjusted to the nearest block level.

There are two columns of city/town information. The first is the reported city/town name in the crime records. The second, which is not in the crime records, is a translation of it into the more commonly known city/town name, or into Marin County when it appears to be in an unincorporated area. For example, Almonte and Tam Valley are reported city/town names, but they are both in the more commonly known city of Mill Valley. Lucas Valley translates to San Rafael, etc. We hope that the translated city/town column will facilitate analysis.

Active business licenses in unincorporated Marin County. These are licenses that were active at a point in time that is within ten days of the end of the last calendar quarter. Tracking is by business type, address and license issue date.

Dataset is updated quarterly.