ZIP 60557 is served primarily by LaSalle County, IL — including Ottawa. ZIP-level data is sparse — showing the LaSalle County aggregate.
Jul peaks. Feb dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Building fires | 283 | 19.3% | |
| 2 | Gas leak (natural gas or LPG) | 181 | 12.3% | |
| 3 | Power line down | 126 | 8.6% | |
| 4 | Brush, or brush and grass mixture fire | 125 | 8.5% | |
| 5 | Unauthorized burning | 110 | 7.5% |
16 cities sit in LaSalle County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Ottawa | 18,708 | 219 | 34 | B |
| 2 | Streator | 12,279 | 340 | 35 | C+ |
| 3 | Peru | 9,831 | 137 | 27 | B+ |
| 4 | LaSalle | 9,562 | 113 | 45 | B- |
| 5 | Mendota | 6,961 | 142 | 12 | B |
| 6 | Lake Holiday | 5,485 | 0 | 0 | — |
| 7 | Marseilles | 4,154 | 101 | 19 | B- |
| 8 | Oglesby | 3,739 | 56 | 9 | B- |
| 9 | Sheridan | 2,694 | 59 | 24 | C+ |
| 10 | Seneca | 2,565 | 43 | 13 | B- |
| 11 | Earlville | 1,838 | 28 | 4 | C+ |
| 12 | Leland | 1,156 | 25 | 6 | C |
| 13 | North Utica | 1,136 | 0 | 0 | A+ |
| 14 | Tonica | 698 | 16 | 1 | C+ |
| 15 | Grand Ridge | 593 | 36 | 25 | C |
| 16 | Millington | 555 | 0 | 0 | A |
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
This ZIP doesn't have enough NFIRS coverage on its own (under 10 reported incidents across 2021–2025) to publish ZIP-level statistics, so we're showing the LaSalle County aggregate above. NFIRS reporting is voluntary and many rural ZIPs roll up to broader county totals. The ZIP-to-county mapping uses SimpleMaps' uscities.zips dataset.