311 Service Requests received by the City of Chicago. This dataset includes requests created after the launch of the new 311 system on 12/18/2018 and some records from the previous system, indicated in the LEGACY_RECORD column.

For purposes of all columns indicating geographic areas or locations, please note that requests of the type 311 INFORMATION ONLY CALL often are entered with the address of the City's 311 Center.

All open abandoned vehicle complaints made to 311 and all requests completed since January 1, 2011. A vehicle can be classified as abandoned if it meets one or more of the following criteria:All open abandoned vehicle complaints made to 311 and all requests completed since January 1, 2011.

A vehicle can be classified as abandoned if it meets one or more of the following criteria: 1) On a public way in a state of disrepair as to be incapable of being driven in its present condition. 2) Has not been moved or used for more than seven consecutive days and is apparently deserted. 3) Has been left on the public way without state registration or a temporary state registration placard for two or more days. 4) Is a hazardous dilapidated vehicle left in full view of the general public, whether on public or private property.

For some Open service requests, the vehicle has been towed but further action is required before the request may be closed. 311 sometimes receives duplicate abandoned vehicle complaints.

If a vehicle is towed it remains as open, work in progress until it is redeemed, transferred or disposed of. The service request is not closed until there is a final disposition for the vehicle.

Requests that have been labeled as Duplicates are in the same geographic area and have been entered into 311 Customer Service Requests (CSR) system at around the same time as a previous request. Duplicate reports/requests are labeled as such in the Status field, as either "Open - Dup" or "Completed - Dup." Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

This dataset contains all open 311 reports of one or more lights out on a wooden pole in the alley and all completed requests since January 1, 2011. If two requests regarding the same address are made within 30 calendar days of each other, the newest CSR is automatically given the status of “Duplicate (Open)”. Once the alley light is repaired, the CSR status will read “Completed” for the original request and “Duplicate (Closed)” for any duplicate requests. Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All open garbage cart requests made to 311 and all requests completed since January 1, 2011. The City of Chicago provides heavy-duty plastic 96-gallon garbage carts to single-family residences and apartment buildings of four units or less. Residents may request new carts when none are present, or replacement carts for ones which have gone missing or been damaged.
311 sometimes receives duplicate requests for garbage carts. Requests that have been labeled as Duplicates are in the same geographic area and have been entered into 311’s Customer Service Requests (CSR) system at around the same time as a previous request. Duplicate reports/requests are labeled as such in the Status field, as either "Open - Dup" or "Completed - Dup." Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All open graffiti removal requests made to 311 and all requests completed since January 1, 2011. The Department of Streets & Sanitation's Graffiti Blasters crews offer a vandalism removal service to private property owners. Graffiti Blasters employ "blast" trucks that use baking soda under high water pressure to erase painted graffiti from brick, stone and other mineral surfaces. They also use paint trucks to cover graffiti on the remaining surfaces. Organizations and residents may report graffiti and request its removal.
311 sometimes receives duplicate requests for graffiti removal. Requests that have been labeled as Duplicates are in the same geographic area and have been entered into 311’s Customer Service Requests (CSR) system at around the same time as a previous request. Duplicate reports/requests are labeled as such in the Status field, as either "Open - Dup" or "Completed - Dup." Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

The Chicago Department of Transportation (CDOT) oversees the patching of potholes on over 4,000 miles of arterial and residential streets in Chicago. CDOT receives reports of potholes through the 311 call center and uses a computerized mapping and tracking system to identify pothole locations and efficiently schedule crews. One call to 311 can generate multiple pothole repairs. When a crew arrives to repair a 311 pothole, it fills all the other potholes within the block. Pothole repairs are generally completed within 7 days from the first report of a pothole to 311. Weather conditions, particularly frigid temps and precipitation, influence how long a repair takes. On days when weather is cooperative and there is no precipitation, crews can fill several thousand potholes.

If a previous request is already open for a buffer of 4 addresses the request is given the status of "Duplicate (Open)". For example, if there is an existing CSR for 6535 N Western and a new request is received for 6531 N Western (which is within four addresses of the original CSR) then the new request is given a status of "Duplicate (Open)".

Once the street is repaired, the status in CSR will read “Completed” for the original request and "Duplicate (Closed)" for any duplicate requests. A service request also receives the status of “Completed” when the reported address is inspected but no potholes are found or have already been filled. If another issue is found with the street, such as a “cave-in” or “failed utility cut”, then it is directed to the appropriate department or contractor.

Data Owner: Transportation. Time Period: All open requests and all completed requests since January 1, 2011. Frequency: Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All open rodent baiting requests and rat complaints made to 311 and all requests completed since January 1, 2011. The Department of Streets & Sanitation investigates reported rat sightings. Alley conditions are examined. If any damaged carts are identified, Sanitation Ward Offices, which distribute the carts are notified. Rodenticide is placed in rat burrows to eradicate nests. 311 sometimes receives duplicate rat complaints and requests for rodent baiting. Requests that have been labeled as Duplicates are in the same geographic area and have been entered into 311’s Customer Service Requests (CSR) system at around the same time as a previous request. Duplicate reports/requests are labeled as such in the Status field, as either "Open - Dup" or "Completed - Dup." Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All open sanitation code complaints made to 311 and all requests completed since January 1, 2011. The Department of Streets and Sanitation investigates and remedies reported violations of Chicago’s sanitation code. Residents may request service for violations such as overflowing dumpsters and garbage in the alley.
311 sometimes receives duplicate sanitation code complaints. Requests that have been labeled as duplicates are in the same geographic area as a previous request and have been entered into 311’s Customer Service Request (CSR) system at around the same time. Duplicate complaints are labeled as such in the status field, as either "Open - Dup" or "Completed - Dup."
Data Owner: Streets and Sanitation (http://www.cityofchicago.org/content/city/en/depts/streets.html).
Time Period: January 1, 2011 to present.
Frequency: Data is updated daily.
Related Applications: 311 Service Request Status Inquiry (https://servicerequest.cityofchicago.org/web_intake_chic/Controller?op=createsrquery2) and Report Sanitation Code Complaint (https://servicerequest.cityofchicago.org/web_intake_chic/Controller?op=locform&invSRType=SCB&invSRDesc=Sanitation%20Code%20Violation&locreq=Y&stnumreqd=Y).

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All open reports of "Street Lights - All Out" (an outage of 3 or more lights) made to 311 and all requests completed since January 1, 2011.The Chicago Department of Transportation (CDOT) oversees approximately 250,000 street lights that illuminate arterial and residential streets in Chicago. CDOT performs repairs and bulb replacements in response to residents’ reports of street light outages.

Whenever CDOT receives a report of an “All Out” the electrician assigned to make the repair looks at all the lights in that circuit (each circuit has 8-16 lights) to make sure that they are all working properly. If a second request of lights out in the same circuit is made within four calendar days of the original request, the newest request is automatically given the status of “Duplicate (Open).” Since CDOT's electrician will be looking at all the lights in a circuit to verify that they are all working, any “Duplicate (Open)” address will automatically be observed and repaired.

Once the street lights are repaired, the status in CSR will read “Completed” for the original request and “Duplicate (Closed)” for any duplicate requests. A service request also receives the status of “Completed” when the reported lights are inspected but found to be in good repair and functioning; when the service request is for a non-existent address; or when the lights are maintained by a contractor. Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

This dataset contains all open 311 reports of one or two lights out on metal poles on a residential or arterial street and all completed requests since January 1, 2011. Whenever CDOT receives a report of a street light outage, the electrician assigned to make the repair looks at all the lights in a group (circuit) to make sure that they are working properly. If two requests regarding the same group are made within 30 calendar days of each other, the newest CSR is automatically given the status of “Duplicate (Open).” Since the electrician will be looking at all the lights in a group to verify that they are all working the “Duplicate (Open)” address will also be observed and repaired. Once the street lights are repaired, the CSR status will read “Completed” for the original request and “Duplicate (Closed)” for any duplicate requests. Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All open tree debris removal requests made to 311 and all requests completed since January 1, 2011. Large piles of branches or bushes may be picked up by the Department of Streets and Sanitation.
311 sometimes creates duplicate requests for tree debris removal. When there is an open tree debris request, a duplicate request is created when the exact same address and the exact same service request type are used. Streets and Sanitation responds to the initial request opened and closes the duplicates. A forestry "Clam" is the name of the vehicle the Forestry Bureau deploys to collect tree debris.
Data Owner: Streets and Sanitation (http://www.cityofchicago.org/content/city/en/depts/streets.html).
Time Period: January 1, 2011 to present.
Frequency: Data is updated daily.
Related Applications: 311 Service Request Status Inquiry (https://servicerequest.cityofchicago.org/web_intake_chic/Controller?op=createsrquery2) and
Request Tree Debris Removal (https://servicerequest.cityofchicago.org/web_intake_chic/Controller?op=locform&invSRType=SEL&invSRDesc=Tree%20Debris&locreq=Y).

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All open and completed tree trim requests made to 311 since January 1, 2011. The Department of Streets and Sanitation maintains all trees growing in the public way and performs regular maintenance trimming in response to 311 requests. Crisis trimming is performed on an emergency basis in response to hazardous conditions such as broken or hanging branches. Requests that have been labeled as Duplicates are in the same geographic area and have been entered into 311’s Customer Service Requests (CSR) system at around the same time as a previous request. Duplicate requests are labeled as such in the Status field, as either "Open - Dup" or "Completed - Dup." Data is updated daily.

As described in http://bit.ly/311HistoricalPost, the function of this dataset was replaced by https://data.cityofchicago.org/d/v6vf-nfxy. This dataset is historical-only.

All 311 calls for open and vacant buildings reported to the City of Chicago since January 1, 2010. The information is updated daily with the previous day's calls added to the records. The data set provides the date of the 311 service request and the unique Service Request # attached to each request. For each request, the following information (as reported by the 311 caller) is available: address location of building; whether building is vacant or occupied; whether the building is open or boarded; entry point if building is open; whether non-residents are occupying or using the building, if the building appears dangerous or hazardous and if the building is vacant due to a fire.

Applicants to the 33rd Ward Alderman vacancy in 2013 with links to applications.

Applicants to the 4th Ward Alderman vacancy in 2016 with links to applications.

Applicants to the 7th Ward Alderman vacancy in 2013 with links to applications.

The rental housing developments listed below are among the thousands of affordable units that are supported by City of Chicago programs to maintain affordability in local neighborhoods. The list is updated periodically when construction is completed for new projects or when the compliance period for older projects expire, typically after 30 years. The list is provided as a courtesy to the public. It does not include every City-assisted affordable housing unit that may be available for rent, nor does it include the hundreds of thousands of naturally occurring affordable housing units located throughout Chicago without City subsidies. For information on rents, income requirements and availability for the projects listed, contact each property directly. For information on other affordable rental properties in Chicago and Illinois, call (877) 428-8844, or visit www.ILHousingSearch.org.

List of locations in NE Illinois, NW Indiana, and SE Wisconsin where alternative vehicle fuels are available. For a Chicago-only filtered view, see https://data.cityofchicago.org/d/fi3z-jc3f. For more detailed descriptions of fields, see http://developer.nrel.gov/docs/transportation/alt-fuel-stations-v1 or https://data.cityofchicago.org/developers/docs/alternative-fuel-locations.

List of businesses registered with the State of Illinois that may levy retail sales taxes in the Chicago area.

Locations of Array of Things sensor nodes. For more information on the Array of Things project, see https://arrayofthings.github.io.

Average Daily Traffic (ADT) counts are analogous to a census count of vehicles on city streets. These counts provide a close approximation to the actual number of vehicles passing through a given location on an average weekday. Since it is not possible to count every vehicle on every city street, sample counts are taken along larger streets to get an estimate of traffic on half-mile or one-mile street segments. ADT counts are used by city planners, transportation engineers, real-estate developers, marketers and many others for myriad planning and operational purposes.
Data Owner: Transportation.
Time Period: 2006.
Frequency: A citywide count is taken approximately every 10 years. A limited number of traffic counts will be taken and added to the list periodically.
Related Applications: Traffic Information Interactive Map (http://webapps.cityofchicago.org/traffic/).

The Chicago Park District issues swim advisories at beaches along Chicago's Lake Michigan lakefront based on E. coli levels. This dataset shows predicted E. coli levels based on an experimental analytical modeling approach.

The Chicago Park District collects and analyzes water samples from beaches along Chicago’s Lake Michigan lakefront. The Chicago Park District partners with the University of Illinois at Chicago Department of Public Health Laboratory to analyze water samples using a new DNA testing method called Rapid Testing Method (qPCR analysis) which tests for Enterococci in order to monitor swimming safety.

The rapid testing method (qPCR analysis) is a new method that measures levels of pathogenic DNA in beach water. Unlike the culture based test that requires up to 24 hours of processing, the new rapid testing method requires a 4-5 hours for results. The Chicago Park District can use results of the rapid test to notify the public when levels exceed UPEPA recommended levels, which is 1000* CCE. When DNA bacteria levels exceed 1000 CCE, a yellow swim advisory flag is implemented. For more information please refer to the USEPA Recreational Water Quality Criteria (http://water.epa.gov/scitech/swguidance/standards/criteria/health/recreation).

Historically, the Chicago Park District used the culture based analysis method and statistical prediction models to monitor beach water quality.
The culture based method tests for Escherichia coli (E. coli) bacteria which is an indicator species for the presence of disease-causing bacteria, viruses, and protozoans that may pose health risks to the public. This method requires 18-24 hours of processing to receive results. The Chicago Park District would use results of the culture based method to notify the public when levels exceed UPEPA recommended levels, which is 235* CFU. When bacteria levels exceed 235 CFU, a yellow swim advisory flag was implemented. This standard is still used at most beaches throughout the Great Lakes region. For more information please refer to the USEPA Recreational Water Quality Criteria.

The statistical prediction model forecasted real-time Escherichia coli (E. coli) bacteria levels present in the water. The Chicago Park District (CPD) in partnership with the US Geological Survey, developed statistical prediction models by using weather data pulled from CPD buoys (https://data.cityofchicago.org/d/qmqz-2xku) and weather stations (https://data.cityofchicago.org/d/k7hf-8y75). The Chicago Park District would use results of the predictive model to notify the public when bacteria levels would exceed 235 CFU. When bacteria levels exceed 235 CFU, a yellow swim advisory flag was implemented.

* The unit of measurement for Escherichia coli is Colony Forming Units (CFU) per 100 milliliters of water. (Culture Based Method / Statistical Prediction Model)
*The unit of measuring DNA is Enterococci Calibrator Cell Equivalents (CCE) per 100 milliliters of water. (Rapid Testing Analysis)