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Acid rain information

Last updated on March 6, 2025.

The Institute for Environmental Science conducts long-term monitoring of acid rain.
On this page, we will inform you of the monitoring results.

For an overview of the survey, see the survey page on air and water environment.

Acid rain information (Kanagawa Ward)

pH and electrical conductivity measurement results of collected rainfall (we collect about one month of precipitation and measure pH and electrical conductivity)
Collection period	pH	Electric conductivity (μS/cm)	Precipitation (mm)
From March 25 to May 7, 2024	5.11	21.10	231.7
May 7-June 3, 2024	5.27	11.12	186.0
June 3-July 1, 2024	5.14	10.39	347.2
From July 1 to July 29, 2024	4.82	12.19	97.0
July 29-August 26, 2024	5.22	16.62	69.0
From August 26 to September 24, 2024	5.43	9.31	237.7 or higher ※１
From September 24 to November 5, 2024	5.25	8.66	205.7
From November 5 to December 2, 2024	5.02	15.86	80.2
From December 2 to December 27, 2024	－	－	0
From December 27, 2024 to February 3, 2025	5.95	11.38	36.5
February 3-March 3, 2025	5.55	34.3	5.3

※1 During heavy rain, some of the rainfall could not be collected due to overflow from the water sampling container.

Acid rain information up to FY2023

※Kanagawa Ward from FY2015 onwards and Isogo Ward before FY2014

Fiscal 2023: Acid rain information (No. 290) (PDF: 74KB)

FY2022: Acid rain information (No. 289) (PDF: 75KB)

FY2021: Acid rain information (No. 288) (PDF: 124KB)

FY2020: Acid rain information (No. 287) (PDF: 130KB)

FY2019: Acid rain information (No. 286) (PDF: 127KB)

From FY2018 to Showa 59 (PDF: 4,567KB)

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