Indoor Air Quality (CCS811)

Indoor Air Quality

First measurement: 2018-11-01 00:00:02
Latest measurement: 2025-11-01 09:30:01
Number of measurements: 122104

	Latest	24h average	24h min	24h max	24h standard deviation
Equivalent CO2	419.20 ppm	564.49 ppm	414 ppm, 09:30:01	742 ppm, 13:30:01	87.35 ppm
Total Volatile Organic Compound	2.30 ppd	24.58 ppd	2 ppd, 09:30:01	52 ppd, 13:30:01	13.38 ppd
Temperature	21.49 C	21.7 C	21.40 C, 08:30:01	21.99 C, 10:16:54	0.14 C
Humidity	31.85 %	33.92 %	31.56 %, 09:00:01	35.75 %, 22:00:01	0.89 %

	Last week average	Last week min	Last week max	Last week standard deviation
Equivalent CO2	585.19 ppm	400 ppm, 2025-10-26 17:00:01	1163 ppm, 2025-10-28 23:00:01	125.88 ppm
Total Volatile Organic Compound	27.71 ppd	0 ppd, 2025-10-26 17:00:01	116 ppd, 2025-10-28 23:00:01	19.19 ppd
Temperature	21.79 C	21.5 C, 2025-10-30 18:30:01	23.75 C, 2025-10-28 21:19:37	0.21 C
Humidity	35.82 %	29.8 %, 2025-10-30 13:00:01	42.08 %, 2025-10-26 10:00:01	2.87 %

	Last month average	Last month min	Last month max	Last month standard deviation
Equivalent CO2	563.73 ppm	400 ppm, 2025-10-01 13:30:01	1334 ppm, 2025-10-04 07:00:01	134.15 ppm
Total Volatile Organic Compound	24.45 ppd	0 ppd, 2025-10-01 13:30:01	142 ppd, 2025-10-04 07:00:01	20.44 ppd
Temperature	21.63 C	21.1 C, 2025-10-02 09:00:01	23.75 C, 2025-10-28 21:19:37	0.25 C
Humidity	35.47 %	26.16 %, 2025-10-18 08:30:02	48.42 %, 2025-10-08 08:00:01	4.11 %

	Last month min day (average)	Last month max day (average)
Equivalent CO2	462.82 ppm, 2025-10-09	785.8 ppm, 2025-10-03
Total Volatile Organic Compound	9.03 ppd, 2025-10-09	58.3 ppd, 2025-10-03
Temperature	21.27 C, 2025-10-05	21.95 C, 2025-10-26
Humidity	29.89 %, 2025-10-17	46.02 %, 2025-10-08

	Last year average	Last year min	Last year max	Last year standard deviation
Equivalent CO2	632.14 ppm	400 ppm, 2024-11-06 13:00:01	1961 ppm, 2024-11-06 21:30:01	218.97 ppm
Total Volatile Organic Compound	35.51 ppd	0 ppd, 2024-11-02 08:30:01	680 ppd, 2024-11-06 21:30:01	37.46 ppd
Temperature	22.56 C	20.7 C, 2024-11-18 20:30:01	29.26 C, 2025-07-25 19:00:01	1.56 C
Humidity	30.34 C	12.45 C, 2025-01-23 18:00:01	63.82 C, 2025-09-09 20:30:01	11.17 C

	Last year min day (average)	Last year max day (average)
Equivalent CO2	415.05 ppm, 2025-05-31	1458.98 ppm, 2025-05-04
Total Volatile Organic Compound	1.9 ppd, 2025-05-31	183.05 ppd, 2025-05-04
Temperature	20.92 C, 2024-11-17	28.39 C, 2025-07-25
Humidity	13.91 C, 2025-02-04	58.47 C, 2025-09-09

	Last year min month (average)	Last year max month (average)
Equivalent CO2	542.21 ppm, 2025-09	717.17 ppm, 2024-12
Total Volatile Organic Compound	21.17 ppd, 2025-09	50.43 ppd, 2024-11
Temperature	21.34 C, 2024-11	26.07 C, 2025-07
Humidity	19.14 C, 2025-01	47.56 C, 2025-09

	All-time average	All-time min	All-time max	All-time standard deviation
Equivalent CO2	881.65 ppm	400 ppm, 2018-11-01 11:30:02	7992 ppm, 2018-11-09 20:00:01	746.37 ppm
Total Volatile Organic Compound	84.8 ppd	0 ppd, 2018-11-01 09:30:02	6508 ppd, 2024-02-02 01:30:01	197.62 ppd
Temperature	22.55 C	19.9 C, 2019-12-01 17:30:02	29.63 C, 2021-06-11 21:30:02	1.58 C
Humidity	29.97 C	5.28 C, 2019-01-27 19:00:01	75.75 C, 2023-08-07 15:00:03	11.27 C

	All-time min day (average)	All-time max day (average)
Equivalent CO2	409.43 ppm, 2024-02-03	3821.89 ppm, 2021-03-10
Total Volatile Organic Compound	1.01 ppd, 2024-02-03	3084.68 ppd, 2024-02-15
Temperature	20.02 C, 2019-12-01	28.66 C, 2022-07-03
Humidity	7.15 C, 2019-01-27	64.37 C, 2023-08-07

	All-time min month (average)	All-time max month (average)
Equivalent CO2	542.21 ppm, 2025-09	1255.95 ppm, 2022-08
Total Volatile Organic Compound	21.17 ppd, 2025-09	295.09 ppd, 2024-02
Temperature	20.62 C, 2020-01	26.38 C, 2021-07
Humidity	14.92 C, 2024-01	51.45 C, 2023-08

Month statistics, Equivalent CO2

	Average	Min	Max	Standard deviation
January	861.23 ppm	400 ppm, 2020-01-01 17:00:02	7992 ppm, 2020-01-04 15:00:02	861.22 ppm
February	871.28 ppm	400 ppm, 2020-02-03 11:00:02	7992 ppm, 2020-02-09 13:30:02	836.53 ppm
March	859.72 ppm	400 ppm, 2020-03-02 11:30:02	7992 ppm, 2020-03-07 19:00:02	730.16 ppm
April	902.49 ppm	400 ppm, 2020-04-03 07:00:02	7992 ppm, 2020-04-09 08:30:02	759.12 ppm
May	875.8 ppm	400 ppm, 2020-05-01 16:00:02	7992 ppm, 2020-05-11 16:00:02	652.74 ppm
June	997.99 ppm	400 ppm, 2020-06-01 23:00:02	7992 ppm, 2020-06-03 21:00:02	842.49 ppm
July	1005.84 ppm	400 ppm, 2020-07-01 19:00:02	7992 ppm, 2019-07-01 22:30:03	833.08 ppm
August	972.5 ppm	400 ppm, 2020-08-01 14:30:02	7992 ppm, 2020-08-02 15:00:02	712.53 ppm
September	806.32 ppm	400 ppm, 2020-09-01 12:30:02	7992 ppm, 2020-09-03 23:30:02	593.34 ppm
October	765.99 ppm	400 ppm, 2020-10-01 12:00:02	7992 ppm, 2020-10-20 20:00:02	584.4 ppm
November	817.65 ppm	400 ppm, 2019-11-03 07:30:02	7992 ppm, 2019-11-26 21:30:02	716.44 ppm
December	832.14 ppm	400 ppm, 2019-12-01 16:30:02	7992 ppm, 2019-12-04 02:00:02	725.58 ppm

	Lowest day average	Highest day average
January	433.42 ppm, 2023-01-29	3628.88 ppm, 2021-01-21
February	409.43 ppm, 2024-02-03	3788.54 ppm, 2020-02-15
March	441.09 ppm, 2021-03-21	3821.89 ppm, 2021-03-10
April	459.4 ppm, 2022-04-04	3146.24 ppm, 2020-04-09
May	415.05 ppm, 2025-05-31	2645.13 ppm, 2020-05-11
June	421.94 ppm, 2025-06-01	3147.77 ppm, 2019-06-01
July	458.56 ppm, 2025-07-03	2936.2 ppm, 2019-07-22
August	447.79 ppm, 2025-08-17	2364.97 ppm, 2020-08-02
September	444.81 ppm, 2022-09-01	2586.04 ppm, 2020-09-26
October	439.61 ppm, 2023-10-08	2538.79 ppm, 2021-10-20
November	437.75 ppm, 2022-11-03	2390.98 ppm, 2022-11-12
December	446.17 ppm, 2020-12-28	2593.05 ppm, 2019-12-22

	Lowest avg, year	Highest avg, year
January	641.25 ppm, 2025	1153.72 ppm, 2021
February	605.12 ppm, 2025	1065.75 ppm, 2022
March	654.62 ppm, 2025	1011.2 ppm, 2019
April	624.4 ppm, 2025	1104.25 ppm, 2020
May	700.36 ppm, 2025	984.95 ppm, 2020
June	577.62 ppm, 2025	1251.48 ppm, 2019
July	630.25 ppm, 2025	1237.68 ppm, 2019
August	610.29 ppm, 2025	1255.95 ppm, 2022
September	542.21 ppm, 2025	1070.79 ppm, 2020
October	563.81 ppm, 2025	891.53 ppm, 2021
November	712.86 ppm, 2024	933.5 ppm, 2021
December	701.27 ppm, 2018	1019.54 ppm, 2019

Month statistics, Total Volatile Organic Compound

	Average	Min	Max	Standard deviation
January	92.23 ppd	0 ppd, 2020-01-01 16:30:02	2326 ppd, 2024-01-03 01:30:02	219.19 ppd
February	103.76 ppd	0 ppd, 2020-02-03 11:00:02	6508 ppd, 2024-02-02 01:30:01	386.45 ppd
March	73.6 ppd	0 ppd, 2020-03-02 11:30:02	1348 ppd, 2023-03-09 09:30:03	123.03 ppd
April	82.39 ppd	0 ppd, 2020-04-03 07:00:02	4275 ppd, 2024-04-07 16:30:01	160.17 ppd
May	80.18 ppd	0 ppd, 2020-05-01 16:00:02	1452 ppd, 2024-05-27 22:00:01	123.5 ppd
June	98.64 ppd	0 ppd, 2020-06-01 23:00:02	2485 ppd, 2024-06-08 18:00:01	151.92 ppd
July	111.09 ppd	0 ppd, 2020-07-01 19:00:02	4226 ppd, 2024-07-11 17:00:01	218.73 ppd
August	96.48 ppd	0 ppd, 2020-08-01 14:00:02	2257 ppd, 2023-08-12 07:30:03	143.29 ppd
September	64.9 ppd	0 ppd, 2020-09-01 12:00:02	1997 ppd, 2024-09-21 16:30:01	105.39 ppd
October	57.72 ppd	0 ppd, 2020-10-01 12:00:02	1334 ppd, 2023-10-28 15:00:03	98.18 ppd
November	77.02 ppd	0 ppd, 2019-11-03 07:30:02	6211 ppd, 2023-11-06 07:00:03	255.23 ppd
December	78.28 ppd	0 ppd, 2019-12-01 16:30:02	5574 ppd, 2022-12-24 01:00:03	206.1 ppd

	Lowest day average	Highest day average
January	4.64 ppd, 2023-01-29	1242.78 ppd, 2024-01-05
February	1.01 ppd, 2024-02-03	3084.68 ppd, 2024-02-15
March	5.86 ppd, 2021-03-21	608.84 ppd, 2023-03-09
April	8.57 ppd, 2022-04-04	725.94 ppd, 2024-04-07
May	1.9 ppd, 2025-05-31	341.54 ppd, 2020-05-11
June	2.98 ppd, 2025-06-01	573.12 ppd, 2024-06-08
July	8.48 ppd, 2025-07-03	1263.86 ppd, 2024-07-07
August	6.8 ppd, 2025-08-17	730.01 ppd, 2023-08-12
September	6.39 ppd, 2022-09-01	395 ppd, 2024-09-21
October	5.56 ppd, 2023-10-08	325.32 ppd, 2021-10-20
November	5.43 ppd, 2022-11-03	2085.07 ppd, 2023-11-06
December	6.59 ppd, 2020-12-28	1048.67 ppd, 2022-12-24

	Lowest avg, year	Highest avg, year
January	36.5 ppd, 2025	232.26 ppd, 2024
February	31.12 ppd, 2025	295.09 ppd, 2024
March	38.76 ppd, 2025	95.12 ppd, 2023
April	33.73 ppd, 2025	106.81 ppd, 2020
May	47.09 ppd, 2025	115.93 ppd, 2024
June	26.57 ppd, 2025	129.24 ppd, 2019
July	34.68 ppd, 2025	169.32 ppd, 2024
August	31.57 ppd, 2025	169.76 ppd, 2023
September	21.17 ppd, 2025	101.72 ppd, 2020
October	24.46 ppd, 2025	74.4 ppd, 2021
November	47.56 ppd, 2018	151.87 ppd, 2023
December	45.42 ppd, 2018	146.1 ppd, 2022

Month statistics, temperature

	Average	Min	Max	Standard deviation
January	21.3 C	19.95 C, 2020-01-21 20:30:02	22.89 C, 2024-01-01 22:00:02	0.57 C
February	21.55 C	20.05 C, 2021-02-03 07:30:02	22.99 C, 2024-02-17 16:30:01	0.47 C
March	21.76 C	20.5 C, 2019-03-10 08:00:02	23.1 C, 2022-03-21 18:00:02	0.45 C
April	22.18 C	20.95 C, 2019-04-10 12:00:02	25.01 C, 2024-04-30 21:00:01	0.6 C
May	23.05 C	21 C, 2025-05-01 12:00:01	28.06 C, 2019-05-17 21:00:02	0.95 C
June	24.8 C	21.2 C, 2023-06-02 07:00:03	29.63 C, 2021-06-11 21:30:02	1.37 C
July	25.21 C	22.85 C, 2024-07-05 07:30:01	29.26 C, 2025-07-25 19:00:01	1.34 C
August	24.1 C	22 C, 2021-08-27 07:30:02	27.86 C, 2025-08-01 19:30:01	0.94 C
September	22.2 C	20.7 C, 2024-09-24 05:30:01	25.41 C, 2019-09-01 18:30:02	0.65 C
October	21.51 C	20.1 C, 2023-10-16 16:30:02	23.75 C, 2025-10-28 21:19:37	0.42 C
November	21.38 C	20 C, 2019-11-08 16:30:02	24.17 C, 2024-11-15 11:30:01	0.47 C
December	21.42 C	19.9 C, 2019-12-01 17:30:02	24.1 C, 2021-12-08 22:30:03	0.62 C

	Lowest day average	Highest day average
January	20.3 C, 2019-01-28	22.5 C, 2024-01-30
February	20.37 C, 2021-02-03	22.42 C, 2024-02-23
March	20.7 C, 2019-03-11	22.66 C, 2022-03-22
April	21.23 C, 2025-04-30	23.47 C, 2019-04-27
May	21.45 C, 2019-05-03	26.08 C, 2024-05-31
June	21.67 C, 2023-06-02	28.13 C, 2022-06-30
July	23.39 C, 2019-07-01	28.66 C, 2022-07-03
August	22.34 C, 2025-08-28	27.48 C, 2025-08-01
September	20.86 C, 2024-09-24	24.31 C, 2019-09-02
October	20.32 C, 2023-10-18	22.48 C, 2020-10-01
November	20.19 C, 2019-11-08	22.51 C, 2023-11-03
December	20.02 C, 2019-12-01	23.58 C, 2021-12-07

	Lowest avg, year	Highest avg, year
January	20.62 C, 2020	21.84 C, 2022
February	21 C, 2021	21.97 C, 2024
March	21.34 C, 2019	22.15 C, 2022
April	21.8 C, 2021	22.75 C, 2023
May	22.52 C, 2025	23.74 C, 2024
June	23.59 C, 2025	25.74 C, 2020
July	24.3 C, 2023	26.38 C, 2021
August	23.89 C, 2023	24.55 C, 2022
September	21.74 C, 2022	22.56 C, 2025
October	21.02 C, 2023	21.9 C, 2020
November	20.81 C, 2019	21.96 C, 2023
December	20.68 C, 2019	22.32 C, 2021

Month statistics, humidity

	Average	Min	Max	Standard deviation
January	19.55 %	5.28 %, 2019-01-27 19:00:01	36.82 %, 2019-01-14 21:00:01	4.69 %
February	19.39 %	7.33 %, 2024-02-11 09:00:01	39.01 %, 2020-02-15 14:00:02	4.18 %
March	20.52 %	11.5 %, 2023-03-30 14:00:03	39.93 %, 2021-03-14 14:00:02	3.48 %
April	21.68 %	10.79 %, 2024-04-04 13:00:01	34.75 %, 2025-04-18 19:30:00	3.44 %
May	26.19 %	12.38 %, 2024-05-08 13:00:01	48.07 %, 2021-05-23 14:00:02	5.51 %
June	36.41 %	19.88 %, 2023-06-01 13:30:03	58.47 %, 2019-06-07 22:00:02	6.54 %
July	42.64 %	23.67 %, 2020-07-02 12:00:02	65.12 %, 2024-07-24 14:00:00	6.88 %
August	46.54 %	27.61 %, 2019-08-04 09:30:01	75.75 %, 2023-08-07 15:00:03	6.6 %
September	43.04 %	27.25 %, 2019-09-25 13:00:02	63.82 %, 2025-09-09 20:30:01	7.72 %
October	34.24 %	17.1 %, 2023-10-25 11:30:03	52.59 %, 2022-10-29 13:00:02	6.45 %
November	27.05 %	10.58 %, 2023-11-27 18:30:02	50.92 %, 2021-11-01 20:00:03	5.89 %
December	21.71 %	8.9 %, 2023-12-31 18:30:02	47.37 %, 2020-12-20 14:30:02	4.63 %

	Lowest day average	Highest day average
January	7.15 %, 2019-01-27	29.74 %, 2020-01-18
February	9.7 %, 2024-02-11	28 %, 2020-02-22
March	13.56 %, 2023-03-30	27.25 %, 2021-03-28
April	14.43 %, 2024-04-04	32.08 %, 2025-04-18
May	15.18 %, 2024-05-08	42.2 %, 2024-05-31
June	22.89 %, 2023-06-01	53.86 %, 2022-06-30
July	26.2 %, 2020-07-02	59.4 %, 2024-07-24
August	29.38 %, 2019-08-04	64.37 %, 2023-08-07
September	29.52 %, 2019-09-23	60.25 %, 2023-09-12
October	18.47 %, 2023-10-27	47.35 %, 2020-10-08
November	14.2 %, 2023-11-27	41.55 %, 2020-11-03
December	11.46 %, 2023-12-31	33.02 %, 2020-12-21

	Lowest avg, year	Highest avg, year
January	14.92 %, 2024	25.25 %, 2020
February	17.36 %, 2024	23.07 %, 2020
March	17.68 %, 2023	22.29 %, 2020
April	20.1 %, 2023	23.45 %, 2021
May	24.31 %, 2020	28.46 %, 2021
June	34.03 %, 2023	39.01 %, 2022
July	37.3 %, 2019	49.64 %, 2024
August	42.98 %, 2019	51.45 %, 2023
September	36.81 %, 2021	50.19 %, 2023
October	27.92 %, 2023	38.23 %, 2020
November	21.38 %, 2023	33.46 %, 2020
December	17.46 %, 2023	26.86 %, 2020

Weekday statistics, Equivalent CO2

	Average	Min	Max	Standard deviation
Monday	862.311 ppm	400 ppm	7992 ppm	685.212 ppm
Tuesday	878.125 ppm	400 ppm	7992 ppm	746.979 ppm
Wednesday	846.013 ppm	400 ppm	7992 ppm	739.213 ppm
Thursday	857.168 ppm	400 ppm	7992 ppm	722.837 ppm
Friday	846.002 ppm	400 ppm	7992 ppm	629.621 ppm
Saturday	1038.59 ppm	400 ppm	7992 ppm	941.026 ppm
Sunday	843.57 ppm	400 ppm	7992 ppm	701.429 ppm

Weekday statistics, Total Volatile Organic Compound

	Average	Min	Max	Standard deviation
Monday	82.207 ppd	0 ppd	6211 ppd	209.22 ppd
Tuesday	81.819 ppd	0 ppd	2822 ppd	150.16 ppd
Wednesday	77.223 ppd	0 ppd	3919 ppd	187.552 ppd
Thursday	83.54 ppd	0 ppd	6440 ppd	230.603 ppd
Friday	77.976 ppd	0 ppd	6508 ppd	202.407 ppd
Saturday	114.173 ppd	0 ppd	5574 ppd	219.396 ppd
Sunday	76.739 ppd	0 ppd	4275 ppd	169.048 ppd

Weekday statistics, temperature

	Average	Min	Max	Standard deviation
Monday	22.552 C	19.97 C	29.24 C	1.573 C
Tuesday	22.584 C	19.95 C	28.8 C	1.577 C
Wednesday	22.545 C	20.05 C	28.97 C	1.579 C
Thursday	22.512 C	20.09 C	29.16 C	1.578 C
Friday	22.537 C	20 C	29.63 C	1.582 C
Saturday	22.567 C	20.06 C	29.1 C	1.591 C
Sunday	22.539 C	19.9 C	29.52 C	1.584 C

Weekday statistics, humidity

	Average	Min	Max	Standard deviation
Monday	29.902 %	6.49 %	75.75 %	11.125 %
Tuesday	30.041 %	6.76 %	70.18 %	11.239 %
Wednesday	29.758 %	6.51 %	65.12 %	11.256 %
Thursday	29.888 %	6.6 %	62.08 %	11.436 %
Friday	30.13 %	5.5 %	66.02 %	11.502 %
Saturday	30.276 %	6.49 %	63.4 %	11.193 %
Sunday	29.781 %	5.28 %	62.52 %	11.118 %