Saved Chicago Data research
Changes in Chicago graffiti service requests Review changes in Chicago graffiti-request counts, including current-status filters, dated source evidence and reporting-system limitations.
Scan evaluated November 9, 2026 · 92 qualifying candidates · 0 annual-only contexts · 68 frequency flags · 32 turn flags
What this measure can tell us These observations count requests in the maintained 311 system by their creation date. A request is not proof of a distinct graffiti event, an inspection, or completed removal. The supported history for this source starts in 2019; earlier chart positions remain unavailable rather than becoming zeros.
The status filter uses the value published when the snapshot was retrieved. It does not reconstruct the status at creation or at each historical month. Recent Open requests have had less time to close. A sharp change in Canceled or Completed records can therefore reflect workflow, classification or cohort age rather than a comparable change in incoming requests.
Early fitted turns around the start of the current system deserve particular caution. Adoption and reporting-system ramp-up can create large factors from a small starting level. The screen retains those observations and their warnings instead of silently trimming them or describing them as confirmed changes in neighborhood conditions.
Source: 311 Service Requests, City of Chicago Data Portal . Source updates after the saved retrieval dates are not incorporated into this preview.
Browse the saved evidence All conditions are listed alphabetically. With JavaScript, choose a signal to rank within this dataset; scores are review priorities, not statistical confidence.
18:00–24:00 · frequency change
185 → 602 raw 12-month totals · 34.75 change / month
Save for review 06:00–12:00 · celeration turn + frequency change
371 → 235 raw 12-month totals · -11.33 change / month
5.83× change between fitted factors · January 2020
Save for review Status: Canceled · frequency change
145 → 5 raw 12-month totals · -11.67 change / month
Save for review 12:00–18:00 · celeration turn
2.11× change between fitted factors · January 2021
Save for review 06:00–12:00 · celeration turn
5.71× change between fitted factors · January 2020
Save for review 12:00–18:00 · frequency change
454 → 293 raw 12-month totals · -13.42 change / month
Save for review All other available filters · celeration turn
3× change between fitted factors · June 2020
Save for review 12:00–18:00 · frequency change
167 → 106 raw 12-month totals · -5.08 change / month
Save for review Status: Completed · celeration turn
3× change between fitted factors · June 2020
Save for review 12:00–18:00 · frequency change
673 → 334 raw 12-month totals · -28.25 change / month
Save for review 06:00–12:00 · celeration turn
6× change between fitted factors · January 2020
Save for review 00:00–06:00 · celeration turn
1.67× change between fitted factors · September 2021
Save for review 18:00–24:00 · frequency change
214 → 428 raw 12-month totals · 17.83 change / month
Save for review All other available filters · frequency change
62 → 131 raw 12-month totals · 5.75 change / month
Save for review Status: Completed · frequency change
61 → 130 raw 12-month totals · 5.75 change / month
Save for review 12:00–18:00 · celeration turn
7.97× change between fitted factors · January 2020
Save for review 06:00–12:00 · frequency change
692 → 331 raw 12-month totals · -30.08 change / month
Save for review Status: Canceled · frequency change
124 → 11 raw 12-month totals · -9.42 change / month
Save for review 12:00–18:00 · celeration turn
4.3× change between fitted factors · January 2020
Save for review 06:00–12:00 · celeration turn + frequency change
482 → 293 raw 12-month totals · -15.75 change / month
7.68× change between fitted factors · January 2020
Save for review Status: Canceled · frequency change
149 → 7 raw 12-month totals · -11.83 change / month
Save for review All other available filters · celeration turn
4.16× change between fitted factors · January 2020
Save for review Status: Completed · celeration turn
4.09× change between fitted factors · January 2020
Save for review 12:00–18:00 · frequency change
287 → 163 raw 12-month totals · -10.33 change / month
Save for review 12:00–18:00 · celeration turn
6.79× change between fitted factors · January 2020
Save for review 06:00–12:00 · frequency change
209 → 109 raw 12-month totals · -8.33 change / month
Save for review 18:00–24:00 · frequency change
190 → 397 raw 12-month totals · 17.25 change / month
Save for review 06:00–12:00 · frequency change
617 → 331 raw 12-month totals · -23.83 change / month
Save for review Status: Canceled · frequency change
265 → 7 raw 12-month totals · -21.5 change / month
Save for review 12:00–18:00 · frequency change
95 → 165 raw 12-month totals · 5.83 change / month
Save for review 12:00–18:00 · frequency change
343 → 215 raw 12-month totals · -10.67 change / month
Save for review 18:00–24:00 · frequency change
127 → 242 raw 12-month totals · 9.58 change / month
Save for review 06:00–12:00 · frequency change
265 → 173 raw 12-month totals · -7.67 change / month
Save for review 18:00–24:00 · frequency change
376 → 688 raw 12-month totals · 26 change / month
Save for review 00:00–06:00 · celeration turn
1.73× change between fitted factors · September 2021
Save for review 18:00–24:00 · frequency change
328 → 652 raw 12-month totals · 27 change / month
Save for review 18:00–24:00 · frequency change
68 → 136 raw 12-month totals · 5.67 change / month
Save for review All other available filters · frequency change
3,134 → 5,690 raw 12-month totals · 213 change / month
Save for review 00:00–06:00 · frequency change
69 → 417 raw 12-month totals · 29 change / month
Save for review 18:00–24:00 · frequency change
728 → 2,769 raw 12-month totals · 170.08 change / month
Save for review Status: Completed · frequency change
3,032 → 5,608 raw 12-month totals · 214.67 change / month
Save for review All other available filters · frequency change
3,248 → 5,044 raw 12-month totals · 149.67 change / month
Save for review 00:00–06:00 · celeration turn + frequency change
80 → 557 raw 12-month totals · 39.75 change / month
1.77× change between fitted factors · May 2025
Save for review 12:00–18:00 · frequency change
1,414 → 855 raw 12-month totals · -46.58 change / month
Save for review 18:00–24:00 · frequency change
1,156 → 3,096 raw 12-month totals · 161.67 change / month
Save for review Status: Completed · frequency change
3,122 → 4,915 raw 12-month totals · 149.42 change / month
Save for review All other available filters · celeration turn
6.15× change between fitted factors · January 2020
Save for review 12:00–18:00 · celeration turn
4.36× change between fitted factors · February 2020
Save for review 18:00–24:00 · frequency change
174 → 478 raw 12-month totals · 25.33 change / month
Save for review Status: Completed · celeration turn
4.96× change between fitted factors · February 2020
Save for review 18:00–24:00 · frequency change
1,153 → 1,925 raw 12-month totals · 64.33 change / month
Save for review 12:00–18:00 · frequency change
2,242 → 1,197 raw 12-month totals · -87.08 change / month
Save for review 00:00–06:00 · frequency change
77 → 138 raw 12-month totals · 5.08 change / month
Save for review 06:00–12:00 · frequency change
151 → 89 raw 12-month totals · -5.17 change / month
Save for review 12:00–18:00 · frequency change
1,908 → 1,143 raw 12-month totals · -63.75 change / month
Save for review 18:00–24:00 · celeration turn
1.88× change between fitted factors · January 2021
Save for review 06:00–12:00 · frequency change
671 → 307 raw 12-month totals · -30.33 change / month
Save for review 18:00–24:00 · frequency change
269 → 528 raw 12-month totals · 21.58 change / month
Save for review 12:00–18:00 · celeration turn
5.08× change between fitted factors · January 2020
Save for review 12:00–18:00 · frequency change
190 → 124 raw 12-month totals · -5.5 change / month
Save for review 18:00–24:00 · frequency change
50 → 158 raw 12-month totals · 9 change / month
Save for review All other available filters · celeration turn
5.91× change between fitted factors · January 2020
Save for review Status: Completed · celeration turn
7.73× change between fitted factors · January 2020
Save for review 18:00–24:00 · frequency change
268 → 449 raw 12-month totals · 15.08 change / month
Save for review All other available filters · frequency change
1,613 → 1,072 raw 12-month totals · -45.08 change / month
Save for review 12:00–18:00 · frequency change
1,060 → 537 raw 12-month totals · -43.58 change / month
Save for review 18:00–24:00 · frequency change
181 → 323 raw 12-month totals · 11.83 change / month
Save for review 06:00–12:00 · celeration turn + frequency change
366 → 197 raw 12-month totals · -14.08 change / month
8.9× change between fitted factors · January 2020
Save for review Status: Completed · frequency change
1,589 → 1,031 raw 12-month totals · -46.5 change / month
Save for review All other available filters · celeration turn + frequency change
231 → 389 raw 12-month totals · 13.17 change / month
6.49× change between fitted factors · January 2020
Save for review 12:00–18:00 · celeration turn + frequency change
87 → 181 raw 12-month totals · 7.83 change / month
2.49× change between fitted factors · August 2020
Save for review 06:00–12:00 · celeration turn
8.01× change between fitted factors · January 2020
Save for review Status: Completed · celeration turn + frequency change
230 → 388 raw 12-month totals · 13.17 change / month
6.49× change between fitted factors · January 2020
Save for review All other available filters · celeration turn
9.19× change between fitted factors · January 2020
Save for review Status: Completed · celeration turn
9.18× change between fitted factors · January 2020
Save for review 18:00–24:00 · frequency change
1,057 → 1,924 raw 12-month totals · 72.25 change / month
Save for review 18:00–24:00 · frequency change
281 → 670 raw 12-month totals · 32.42 change / month
Save for review All other available filters · frequency change
1,466 → 852 raw 12-month totals · -51.17 change / month
Save for review 12:00–18:00 · celeration turn + frequency change
575 → 313 raw 12-month totals · -21.83 change / month
5.15× change between fitted factors · January 2020
Save for review 06:00–12:00 · frequency change
277 → 111 raw 12-month totals · -13.83 change / month
Save for review Status: Completed · frequency change
1,366 → 851 raw 12-month totals · -42.92 change / month
Save for review 12:00–18:00 · celeration turn
6.25× change between fitted factors · January 2020
Save for review All other available filters · frequency change
503 → 316 raw 12-month totals · -15.58 change / month
Save for review 12:00–18:00 · frequency change
254 → 73 raw 12-month totals · -15.08 change / month
Save for review 06:00–12:00 · celeration turn
1.95× change between fitted factors · July 2021
Save for review Status: Completed · frequency change
502 → 316 raw 12-month totals · -15.5 change / month
Save for review All other available filters · frequency change
1,611 → 1,000 raw 12-month totals · -50.92 change / month
Save for review 18:00–24:00 · frequency change
696 → 403 raw 12-month totals · -24.42 change / month
Save for review 06:00–12:00 · frequency change
291 → 152 raw 12-month totals · -11.58 change / month
Save for review Status: Completed · frequency change
1,500 → 997 raw 12-month totals · -41.92 change / month
Save for review 18:00–24:00 · frequency change
99 → 239 raw 12-month totals · 11.67 change / month
Save for review 18:00–24:00 · frequency change
1,690 → 2,587 raw 12-month totals · 74.75 change / month
Save for review No recorded candidate matches these filters. Try a different signal, community or search. This does not establish that the data were stable.
