Counts of ranger-reported incidents by calendar month by various categories of infractions and by park or preserve. Rangers and law enforcement personnel enter these incidents into an internal tracking system. Data spans a rolling, seven year period beginning seven years before the last update date.

The data includes monthly counts of citations and field identifications.

This dataset has been retired as of February 17, 2023. This dataset will be kept for historical purposes, but will no longer be updated. Similar data are available on the state’s open data portal: https://data.chhs.ca.gov/dataset/covid-19-time-series-metrics-by-county-and-state.

A. DATASET DESCRIPTION
This dataset contains COVID-19 positive confirmed cases aggregated by several different geographic areas and by day. COVID-19 cases are mapped to the residence of the individual and shown on the date the positive test was collected. In addition, 2019 American Community Survey (ACS) 5-year population estimates are included to calculate the cumulative rate per 10,000 residents.

Dataset covers cases going back to March 18th, 2020 when the first person in Marin County tested positive for COVID-19. This data may not be immediately available for recently reported cases and data will change to reflect as information becomes available. Data updated daily.

COVID-19 case data undergo quality assurance and other data verification processes and are continually updated to maximize completeness and accuracy of information. This means data may change for previous days as information is updated.

Geographic areas summarized are:
1. City, Town, or Community Area
2. Census Tracts
3. Census ZIP Code Tabulation Areas (ZCTAs)

B. HOW THE DATASET IS CREATED
Addresses from the COVID-19 case data are geocoded by Marin County HHS. Those addresses are spatially joined to the geographic areas. Counts are generated based on the number of address points that match each geographic area for a given date.

The 2019 ACS estimates for population provided by the Census are used to create a cumulative rate which is equal to ([cumulative count up to that date] / [acs_population]) * 10000) representing the number of total cases per 10,000 residents (as of the specified date).

C. UPDATE PROCESS
Geographic analysis is scripted by Marin HHS staff and synced to this dataset each day.

D. HOW TO USE THIS DATASET
This dataset can be used to track the spread of COVID-19 throughout Marin County in a variety of geographic areas. Note that the new cases column in the data represents the number of new cases confirmed in a certain area on the specified day, while the cumulative cases column is the cumulative total of cases in a certain area as of the specified date.

Privacy rules in effect
To protect privacy, certain rules are in effect:
1. Any area with a cumulative case count less than 10 are dropped for all days the cumulative count was less than 10. These will be null values. For example if a zip code did not have 10 cumulative cases until June 1, 2020 that location will not be included in the dataset until June 1.
2. Once an area has a cumulative case count of 10 or greater, that area will have a new row of case data every day following.
3. 3. Cases are dropped altogether for areas where acs_population < 1000. Some adjacent geographic areas may be combined until the ACS population exceeds 1,000 to still provide information for these regions.

Note: 14-day case rate or 30-day case rate where the counts are lower than 20 may be unstable. We advise caution in interpreting rates at these small numbers.

A note on Census ZIP Code Tabulation Areas (ZCTAs)
ZIP Code Tabulation Areas are special boundaries created by the U.S. Census based on ZIP Codes developed by the USPS. They are not, however, the same thing. ZCTAs are areal representations of routes.

The County has made great strides in reducing its own carbon footprint, but a similar commitment to sustainable living must be adopted by every resident regardless of their demographic profile.

This data set provides the number of COVID-19 tests per day performed among Marin county residents and the percent positivity of those tests. The data comes from testing results reported to the California Department of Public health (CDPH). This is the same data used to calculate the county-level testing rate for the State Blueprint Metrics. Testing volume for the last two weeks is provisional and subject to change due to the lag in testing reporting.

Note: CDPH calculates Percent Positivity using a 7-day lag (on November 17 the most recent calculated date will be November 10), with a 7-day window (sum of all positive tests in prior 7 days divided by the sum of all tests in the prior 7 days).  

Emergency Medical Service ambulance dispatch incidents in Marin County, CA, for the period beginning March, 2013 through September, 2019. Data is updated every three to six months. 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.