Annual NTN Maps by Year
If you intend on reprinting any of these maps for use in a publication, please read our Use Conditions.
2023
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | GRID | Lab H+ | GRID | ||||
SO4 | GRID | SO4 | GRID | ||||
NO3 | GRID | NO3 | GRID | ||||
NH4 | GRID | NH4 | GRID | ||||
Ca | GRID | Ca | GRID | ||||
Mg | GRID | Mg | GRID | ||||
K | GRID | K | GRID | ||||
Na | GRID | Na | GRID | ||||
Cl | GRID | Cl | GRID | ||||
N | GRID | ||||||
S+N | GRID | ||||||
Total Precipitation | Grid |
2022
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | GRID | Lab H+ | GRID | ||||
SO4 | GRID | SO4 | GRID | ||||
NO3 | GRID | NO3 | GRID | ||||
NH4 | GRID | NH4 | GRID | ||||
Ca | GRID | Ca | GRID | ||||
Mg | GRID | Mg | GRID | ||||
K | GRID | K | GRID | ||||
Na | GRID | Na | GRID | ||||
Cl | GRID | Cl | GRID | ||||
N | GRID | ||||||
S+N | GRID | ||||||
Total Precipitation | Grid |
2021
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | GRID | Lab H+ | GRID | ||||
SO4 | GRID | SO4 | GRID | ||||
NO3 | GRID | NO3 | GRID | ||||
NH4 | GRID | NH4 | GRID | ||||
Ca | GRID | Ca | GRID | ||||
Mg | GRID | Mg | GRID | ||||
K | GRID | K | GRID | ||||
Na | GRID | Na | GRID | ||||
Cl | GRID | Cl | GRID | ||||
N | GRID | ||||||
S+N | GRID | ||||||
Total Precipitation | Grid |
2020
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | GRID | Lab H+ | GRID | ||||
SO4 | GRID | SO4 | GRID | ||||
NO3 | GRID | NO3 | GRID | ||||
NH4 | GRID | NH4 | GRID | ||||
Ca | GRID | Ca | GRID | ||||
Mg | GRID | Mg | GRID | ||||
K | GRID | K | GRID | ||||
Na | GRID | Na | GRID | ||||
Cl | GRID | Cl | GRID | ||||
N | GRID | ||||||
S+N | GRID | ||||||
Total Precipitation | Grid |
2019
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | GRID | Lab H+ | GRID | ||||
SO4 | GRID | SO4 | GRID | ||||
NO3 | GRID | NO3 | GRID | ||||
NH4 | GRID | NH4 | GRID | ||||
Ca | GRID | Ca | GRID | ||||
Mg | GRID | Mg | GRID | ||||
K | GRID | K | GRID | ||||
Na | GRID | Na | GRID | ||||
Cl | GRID | Cl | GRID | ||||
N | GRID | ||||||
S+N | GRID | ||||||
Total Precipitation | Grid |
2018
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2017
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
NH4 (err)* | Grid | NH4 (err)* | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
N (err)* | Grid | ||||||
S+N | Grid | ||||||
S+N (err)* | Grid | ||||||
Total Precipitation | Grid |
* (err): These are the original maps and grids generated with the incorrect mdl values.
These were replaced with corrected maps and grids in November 2024.
Click here for details.
2016
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
NH4 (err)* | Grid | NH4 (err)* | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
N (err)* | Grid | ||||||
S+N | Grid | ||||||
S+N (err)* | Grid | ||||||
Total Precipitation | Grid |
* (err): These are the original maps and grids generated with the incorrect mdl values.
These were replaced with corrected maps and grids in November 2024.
Click here for details.
2015
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2014
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2013
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2012
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2011
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2010
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2009
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2008
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2007
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2006
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2005
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2004
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2003
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2002
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2001
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
2000
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1999
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1998
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1997
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1996
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1995
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1994
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1993
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1992
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1991
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1990
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1989
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1988
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |
1987
Concentration | Deposition | ||||||
---|---|---|---|---|---|---|---|
Lab pH | Grid | Lab H+ | Grid | ||||
SO4 | Grid | SO4 | Grid | ||||
NO3 | Grid | NO3 | Grid | ||||
NH4 | Grid | NH4 | Grid | ||||
Ca | Grid | Ca | Grid | ||||
Mg | Grid | Mg | Grid | ||||
K | Grid | K | Grid | ||||
Na | Grid | Na | Grid | ||||
Cl | Grid | Cl | Grid | ||||
N | Grid | ||||||
S+N | Grid | ||||||
Total Precipitation | Grid |