> For the complete documentation index, see [llms.txt](https://docs.civitia.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.civitia.org/game-mechanics/city-radiation.md).

# City Radiation

Cities Score determines its Radiation. 

*Score* *= Total contributions - Total sabotages*

* There are 6 levels of Radiation. 
* Every new season cities are reset to 5/5 Radiation.

Every level of Radiation has a rent multiplier increase effect to each city base rent but only changed by Radiation level thresholds.

<table><thead><tr><th width="176">Net Score</th><th width="181">Radiation</th><th width="182">Rent multiplier</th></tr></thead><tbody><tr><td>-∞ to 10k</td><td>5/5</td><td>x1</td></tr><tr><td>10k to 20k</td><td>4/5</td><td>x1.1</td></tr><tr><td>20k to 40k</td><td>3/5</td><td>x1.2</td></tr><tr><td>40k to 60k</td><td>2/5</td><td>x1.4</td></tr><tr><td>60k to 100k</td><td>1/5</td><td>x1.6</td></tr><tr><td>100k to +∞</td><td>0/5</td><td>x4</td></tr></tbody></table>

Below you can find an example for Singapore with a initial base rent at 0.2 INIT

<table><thead><tr><th width="188">Current Singapore Net Score</th><th width="181">Radiation level</th><th width="152">Rent multiplier</th><th>Final rent</th></tr></thead><tbody><tr><td>-50k</td><td>5/5</td><td>x1</td><td>0.20 INIT</td></tr><tr><td>0k</td><td>5/5</td><td>x1</td><td>0.20 INIT</td></tr><tr><td>5k</td><td>5/5</td><td>x1</td><td>0.20 INIT</td></tr><tr><td>15k</td><td>4/5</td><td>x1.1</td><td>0.22 INIT</td></tr><tr><td>30k</td><td>3/5</td><td>x1.2</td><td>0.24 INIT</td></tr><tr><td>50k</td><td>2/5</td><td>x1.4</td><td>0.28 INIT</td></tr><tr><td>80k</td><td>1/5</td><td>x1.6</td><td>0.32 INIT</td></tr><tr><td>101k</td><td>0/5</td><td>x4</td><td>0.80 INIT</td></tr><tr><td>120k</td><td>0/5</td><td>x4</td><td>0.80 INIT</td></tr></tbody></table>


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