aqi-calculator

Air Quality Index (AQI) Calculator with Python

This AQI (Air Quality Index) calculator is a Python function that calculates the AQI of a given concentration of either PM2.5 or PM10 pollutants based on the US EPA (Environmental Protection Agency) standard. The function takes in two parameters:

• concentration: The concentration of the pollutant in micrograms per cubic meter (μg/m³).
• pollutant: The type of pollutant, which can be either "PM2.5" or "PM10".

The function returns the calculated AQI value rounded to one decimal place as an integer.

The AQI is calculated using the following formula:

• If pollutant is "PM2.5":

  AQI = ((I_high - I_low)/(C_high - C_low)) * (concentration - C_low) + I_low
  

  Where C_low and C_high are the lower and upper bounds of the concentration ranges, and I_low and I_high are the corresponding AQI values for those concentration ranges.

• If pollutant is "PM10":

  AQI = ((I_high - I_low)/(C_high - C_low)) * (concentration - C_low) + I_low
  

  Where C_low and C_high are the lower and upper bounds of the concentration ranges, and I_low and I_high are the corresponding AQI values for those concentration ranges.

The concentration ranges and their corresponding AQI values for both PM2.5 and PM10 pollutants are as follows:

Pollutant	C_low (μg/m³)	C_high (μg/m³)	I_low	I_high
PM2.5	0	12.0	0	50
	12.1	35.4	51	100
	35.5	55.4	101	150
	55.5	150.4	151	200
	150.5	250.4	201	300
	250.5	350.4	301	400
	350.5	500.4	401	500
	500.5	999.9	501	999
PM10	0	54	0	50
	55	154	51	100
	155	254	101	150
	255	354	151	200
	355	424	201	300
	425	504	301	400
	505	604	401	500
	605	999	501	999

If the input concentration is below the AQI scale, the function will return the string "Input concentration is below AQI scale". If an invalid pollutant type is passed as the input pollutant, the function will raise

The documentation for using the AQI calculator consists of several functions and their usage instructions. Here is an explanation of each:

1. Function calc_aqi_us() This function is used to calculate the AQI based on the US EPA standard. It has two parameters: concentration and pollutant. concentration is the pollutant concentration in µg/m³ and pollutant is the type of pollutant for which the AQI will be calculated. The function returns the AQI value or an error message if the pollutant parameter is invalid. 🌍

2. Function calculate_aqi() This function is also used to calculate the AQI based on pollutant concentration. It has two parameters: concentration and pollutant. concentration is the pollutant concentration in µg/m³ and pollutant is the type of pollutant for which the AQI will be calculated. The function returns the AQI value or an error message if the pollutant parameter is invalid. 🔬

3. Function calc_pm() This function is used to prompt user input and calculate the concentration of PM2.5, PM10, and their AQI. It has no parameters. The user will be prompted to select the type of pollutant to be calculated. If PM2.5 or PM10 is selected, the user will be prompted to enter the pollutant concentration in µg/m³ and the resulting AQI will be displayed. If AQI is selected, the user will be prompted to enter the pollutant type and the AQI value will be displayed. 🤖

4. Usage instructions Users can import these functions into their Python program and call them as needed. The calc_pm() function is the main function that can be executed to prompt user input and calculate the concentration of PM2.5, PM10, and their AQI. 🚀