Acid-rain monitoring site-years, the whole record

Every site-year in the TerraPulse dex over the whole record: a count by year, a map and the 50 newest, measured, with the source and licence of every number.

5,406 site-years over the whole record.

Measured by epa_ltm_acidified_waters. US federal work - public domain by statute (17 U.S.C. 105). Lake of 2026-11-07.