Table 5.16 - Phosphorus and nitrogen levels in lakes in relatively unpolluted areas such as remote mountain regions and national parks

Sources:

  1. Morales-Baquero et al, 1992;
  2. Catalan et al, 1992;
  3. Fott et al, 1992;
  4. Viaroli et al, 1992;
  5. Mosello, 1981;
  6. Mosello, 1984;
  7. Mosello et al, 1991;
  8. SCB Sweden, 1990;
  9. Borg, 1987;
  10. Heitto, 1990;
  11. Schwoerbel, 1989

Site Country
Ý
Number of lakes Total phosphorus
µg P/l
Nitrate µg N/l Ammonium
µg N/l
Sierra Nevada1 ES 10 3.9* 6 ­
Pyrenees2 ES 102 ~15 ~139 ~25
Tatra Mountains3 SK 10 5.7 400 14
Northern Apennines4 IT 43 14 112 28
Southern Alps5 IT 50 19 327 42
Italian Alps6 IT 320 <10 (85%) 14 18
Italian Alps, Aosta Valley7 IT 100 ­ 140 ­
Sweden, reference-lakes8 SE 154 <15 (80%) <750# (87%) ­
Northern Sweden, forest lakes9 SE 59 13.2 350 ­
Finland, forest lakes10 FI 135 10 ­ ­
Black Forest Lakes11 DE 6 ­ 429 ­

Notes: Values shown are mean values or percentages with concentrations below a specified limit.

* dissolved orthophosphate # total nitrogen &Yacute; for country codes see Table 5.9.