Indoor Air Quality (CCS811)

Indoor Air Quality

First measurement: 2018-11-01 00:00:02
Latest measurement: 2026-08-01 08:00:01
Number of measurements: 135081

	Latest	24h average	24h min	24h max	24h standard deviation
Equivalent CO2	421.97 ppm	671.41 ppm	418 ppm, 08:00:01	945 ppm, 14:30:01	141.74 ppm
Total Volatile Organic Compound	2.97 ppd	40.85 ppd	2 ppd, 08:00:01	83 ppd, 14:30:01	21.57 ppd
Temperature	24.53 C	25.06 C	24.53 C, 07:30:01	25.43 C, 21:30:01	0.27 C
Humidity	54.27 %	58.02 %	52.70 %, 07:00:01	62.92 %, 19:30:01	2.49 %

	Last week average	Last week min	Last week max	Last week standard deviation
Equivalent CO2	611.96 ppm	400 ppm, 2026-07-26 18:30:01	961 ppm, 2026-07-28 00:00:01	142.8 ppm
Total Volatile Organic Compound	31.78 ppd	0 ppd, 2026-07-26 18:30:01	85 ppd, 2026-07-28 00:00:01	21.75 ppd
Temperature	24.42 C	23.45 C, 2026-07-26 08:30:01	25.43 C, 2026-07-31 21:30:01	0.46 C
Humidity	52.2 %	44.8 %, 2026-07-29 12:30:01	62.92 %, 2026-07-31 19:30:01	4.3 %

	Last month average	Last month min	Last month max	Last month standard deviation
Equivalent CO2	683.84 ppm	400 ppm, 2026-07-13 06:00:01	2164 ppm, 2026-07-18 22:00:01	342.12 ppm
Total Volatile Organic Compound	58.81 ppd	0 ppd, 2026-07-09 06:30:01	1058 ppd, 2026-07-18 22:00:01	126.74 ppd
Temperature	24.65 C	22.99 C, 2026-07-21 06:30:01	26.42 C, 2026-07-15 21:30:01	0.62 C
Humidity	44.71 %	30.39 %, 2026-07-21 15:00:01	62.92 %, 2026-07-31 19:30:01	5.77 %

	Last month min day (average)	Last month max day (average)
Equivalent CO2	460.19 ppm, 2026-07-29	1841.47 ppm, 2026-07-19
Total Volatile Organic Compound	8.72 ppd, 2026-07-29	512.94 ppd, 2026-07-19
Temperature	23.98 C, 2026-07-21	25.5 C, 2026-07-15
Humidity	36.64 %, 2026-07-21	58.22 %, 2026-07-31

	Last year average	Last year min	Last year max	Last year standard deviation
Equivalent CO2	614.55 ppm	400 ppm, 2025-08-01 00:30:01	2164 ppm, 2026-07-18 22:00:01	222.21 ppm
Total Volatile Organic Compound	34.31 ppd	0 ppd, 2025-08-01 00:30:01	1058 ppd, 2026-07-18 22:00:01	52.48 ppd
Temperature	22.55 C	20.7 C, 2026-04-04 07:30:01	27.86 C, 2025-08-01 19:30:01	1.22 C
Humidity	30.77 %	6.37 %, 2026-02-01 09:00:00	63.82 %, 2025-09-09 20:30:01	12.07 %

	Last year min day (average)	Last year max day (average)
Equivalent CO2	421.36 ppm, 2026-01-18	1841.47 ppm, 2026-07-19
Total Volatile Organic Compound	2.8 ppd, 2026-01-18	512.94 ppd, 2026-07-19
Temperature	21.1 C, 2026-04-04	27.83 C, 2025-07-31
Humidity	7.59 %, 2026-02-01	58.47 %, 2025-09-09

	Last year min month (average)	Last year max month (average)
Equivalent CO2	542.21 ppm, 2025-09	730.91 ppm, 2026-02
Total Volatile Organic Compound	21.17 ppd, 2025-09	58.8 ppd, 2026-07
Temperature	21.59 C, 2026-01	24.65 C, 2026-07
Humidity	13.66 %, 2026-02	47.56 %, 2025-09

	All-time average	All-time min	All-time max	All-time standard deviation
Equivalent CO2	857.24 ppm	400 ppm, 2018-11-01 11:30:02	7992 ppm, 2018-11-09 20:00:01	717.32 ppm
Total Volatile Organic Compound	80.21 ppd	0 ppd, 2018-11-01 09:30:02	6508 ppd, 2024-02-02 01:30:01	189.28 ppd
Temperature	22.54 C	19.9 C, 2019-12-01 17:30:02	29.63 C, 2021-06-11 21:30:02	1.54 C
Humidity	29.63 %	5.28 %, 2019-01-27 19:00:01	75.75 %, 2023-08-07 15:00:03	11.2 %

	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 %, 2019-01-27	64.37 %, 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	13.66 %, 2026-02	51.45 %, 2023-08

Month statistics, Equivalent CO2

	Average	Min	Max	Standard deviation
January	830.67 ppm	400 ppm, 2020-01-01 17:00:02	7992 ppm, 2020-01-04 15:00:02	812.83 ppm
February	853.73 ppm	400 ppm, 2020-02-03 11:00:02	7992 ppm, 2020-02-09 13:30:02	792.54 ppm
March	825.16 ppm	400 ppm, 2020-03-02 11:30:02	7992 ppm, 2020-03-07 19:00:02	693.23 ppm
April	868.06 ppm	400 ppm, 2020-04-03 07:00:02	7992 ppm, 2020-04-09 08:30:02	719.5 ppm
May	843.69 ppm	400 ppm, 2020-05-01 16:00:02	7992 ppm, 2020-05-11 16:00:02	620.02 ppm
June	953.03 ppm	400 ppm, 2020-06-01 23:00:02	7992 ppm, 2020-06-03 21:00:02	800.83 ppm
July	965.58 ppm	400 ppm, 2020-07-01 19:00:02	7992 ppm, 2019-07-01 22:30:03	796.28 ppm
August	972.5 ppm	400 ppm, 2020-08-01 14:30:02	7992 ppm, 2020-08-02 15:00:02	712.47 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	788.1 ppm	400 ppm, 2019-11-03 07:30:02	7992 ppm, 2019-11-26 21:30:02	677.87 ppm
December	801.2 ppm	400 ppm, 2019-12-01 16:30:02	7992 ppm, 2019-12-04 02:00:02	687.59 ppm

	Lowest day average	Highest day average
January	421.36 ppm, 2026-01-18	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	435.81 ppm, 2025-11-26	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	616.73 ppm, 2026	1153.72 ppm, 2021
February	605.12 ppm, 2025	1065.75 ppm, 2022
March	583.27 ppm, 2026	1011.2 ppm, 2019
April	624.4 ppm, 2025	1104.25 ppm, 2020
May	618.91 ppm, 2026	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	581.25 ppm, 2025	933.5 ppm, 2021
December	584.65 ppm, 2025	1019.54 ppm, 2019

Month statistics, Total Volatile Organic Compound

	Average	Min	Max	Standard deviation
January	84.85 ppd	0 ppd, 2020-01-01 16:30:02	2326 ppd, 2024-01-03 01:30:02	206.3 ppd
February	97.53 ppd	0 ppd, 2020-02-03 11:00:02	6508 ppd, 2024-02-02 01:30:01	362.78 ppd
March	68.29 ppd	0 ppd, 2020-03-02 11:30:02	1348 ppd, 2023-03-09 09:30:03	118.1 ppd
April	76.4 ppd	0 ppd, 2020-04-03 07:00:02	4275 ppd, 2024-04-07 16:30:01	151.1 ppd
May	74.27 ppd	0 ppd, 2020-05-01 16:00:02	1452 ppd, 2024-05-27 22:00:01	117.01 ppd
June	90.79 ppd	0 ppd, 2020-06-01 23:00:02	2485 ppd, 2024-06-08 18:00:01	144.19 ppd
July	104.56 ppd	0 ppd, 2020-07-01 19:00:02	4226 ppd, 2024-07-11 17:00:01	210.28 ppd
August	96.48 ppd	0 ppd, 2020-08-01 14:00:02	2257 ppd, 2023-08-12 07:30:03	143.28 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	70.78 ppd	0 ppd, 2019-11-03 07:30:02	6211 ppd, 2023-11-06 07:00:03	239.49 ppd
December	71.98 ppd	0 ppd, 2019-12-01 16:30:02	5574 ppd, 2022-12-24 01:00:03	193.98 ppd

	Lowest day average	Highest day average
January	2.8 ppd, 2026-01-18	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	5.01 ppd, 2025-11-26	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	33.22 ppd, 2026	232.26 ppd, 2024
February	31.12 ppd, 2025	295.09 ppd, 2024
March	31.12 ppd, 2026	95.12 ppd, 2023
April	33.73 ppd, 2025	106.81 ppd, 2020
May	32.94 ppd, 2026	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	27.13 ppd, 2025	151.87 ppd, 2023
December	27.89 ppd, 2025	146.1 ppd, 2022

Month statistics, temperature

	Average	Min	Max	Standard deviation
January	21.33 C	19.95 C, 2020-01-21 20:30:02	22.89 C, 2024-01-01 22:00:02	0.55 C
February	21.59 C	20.05 C, 2021-02-03 07:30:02	22.99 C, 2024-02-17 16:30:01	0.47 C
March	21.8 C	20.5 C, 2019-03-10 08:00:02	23.27 C, 2026-03-09 17:30:01	0.46 C
April	22.13 C	20.7 C, 2026-04-04 07:30:01	25.01 C, 2024-04-30 21:00:01	0.6 C
May	23.02 C	21 C, 2025-05-01 12:00:01	28.06 C, 2019-05-17 21:00:02	0.97 C
June	24.69 C	21.2 C, 2023-06-02 07:00:03	29.63 C, 2021-06-11 21:30:02	1.33 C
July	25.14 C	22.85 C, 2024-07-05 07:30:01	29.26 C, 2025-07-25 19:00:01	1.29 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	21.42 C	20 C, 2019-11-08 16:30:02	24.17 C, 2024-11-15 11:30:01	0.47 C
December	21.49 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	21.1 C, 2026-04-04	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	21.76 C, 2026	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	19.05 %	5.28 %, 2019-01-27 19:00:01	36.82 %, 2019-01-14 21:00:01	4.67 %
February	18.67 %	6.37 %, 2026-02-01 09:00:00	39.01 %, 2020-02-15 14:00:02	4.48 %
March	20.8 %	11.5 %, 2023-03-30 14:00:03	39.93 %, 2021-03-14 14:00:02	3.43 %
April	21.63 %	10.79 %, 2024-04-04 13:00:01	34.75 %, 2025-04-18 19:30:00	3.34 %
May	26.49 %	12.38 %, 2024-05-08 13:00:01	48.07 %, 2021-05-23 14:00:02	5.59 %
June	36.89 %	19.88 %, 2023-06-01 13:30:03	58.47 %, 2019-06-07 22:00:02	6.5 %
July	42.89 %	23.67 %, 2020-07-02 12:00:02	65.12 %, 2024-07-24 14:00:00	6.79 %
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	27.25 %	10.58 %, 2023-11-27 18:30:02	50.92 %, 2021-11-01 20:00:03	5.88 %
December	22.19 %	8.9 %, 2023-12-31 18:30:02	47.37 %, 2020-12-20 14:30:02	4.68 %

	Lowest day average	Highest day average
January	7.15 %, 2019-01-27	29.74 %, 2020-01-18
February	7.59 %, 2026-02-01	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	13.66 %, 2026	23.07 %, 2020
March	17.68 %, 2023	22.73 %, 2026
April	20.1 %, 2023	23.45 %, 2021
May	24.31 %, 2020	28.6 %, 2026
June	34.03 %, 2023	40.27 %, 2026
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	841.536 ppm	400 ppm	7992 ppm	658.906 ppm
Tuesday	853.235 ppm	400 ppm	7992 ppm	717.42 ppm
Wednesday	821.403 ppm	400 ppm	7992 ppm	709.127 ppm
Thursday	830.967 ppm	400 ppm	7992 ppm	694.042 ppm
Friday	827.8 ppm	400 ppm	7992 ppm	605.054 ppm
Saturday	1006.625 ppm	400 ppm	7992 ppm	904.796 ppm
Sunday	819.317 ppm	400 ppm	7992 ppm	676.2 ppm

Weekday statistics, Total Volatile Organic Compound

	Average	Min	Max	Standard deviation
Monday	77.955 ppd	0 ppd	6211 ppd	199.787 ppd
Tuesday	77.178 ppd	0 ppd	2822 ppd	143.89 ppd
Wednesday	72.53 ppd	0 ppd	3919 ppd	179.04 ppd
Thursday	78.158 ppd	0 ppd	6440 ppd	219.932 ppd
Friday	74.223 ppd	0 ppd	6508 ppd	193.057 ppd
Saturday	108.599 ppd	0 ppd	5574 ppd	211.703 ppd
Sunday	72.868 ppd	0 ppd	4275 ppd	163.364 ppd

Weekday statistics, temperature

	Average	Min	Max	Standard deviation
Monday	22.542 C	19.97 C	29.24 C	1.533 C
Tuesday	22.571 C	19.95 C	28.8 C	1.535 C
Wednesday	22.533 C	20.05 C	28.97 C	1.543 C
Thursday	22.498 C	20.09 C	29.16 C	1.541 C
Friday	22.53 C	20 C	29.63 C	1.545 C
Saturday	22.557 C	20.06 C	29.1 C	1.555 C
Sunday	22.529 C	19.9 C	29.52 C	1.547 C

Weekday statistics, humidity

	Average	Min	Max	Standard deviation
Monday	29.556 %	6.49 %	75.75 %	11.028 %
Tuesday	29.653 %	6.76 %	70.18 %	11.124 %
Wednesday	29.426 %	6.51 %	65.12 %	11.172 %
Thursday	29.51 %	6.6 %	62.08 %	11.322 %
Friday	29.817 %	5.5 %	66.02 %	11.403 %
Saturday	29.987 %	6.49 %	63.4 %	11.196 %
Sunday	29.488 %	5.28 %	62.52 %	11.156 %