| Subject | English | German |
| environ. | diffuse source | diffuse Quelle |
| environ. | diffuse source | Diffuse Quelle |
| environ. | diffuse source Pollution which arises from various activities with no discrete source | Diffuse Quelle |
| environ. | diffuse source input | Stoffeintrag aus diffuser Quelle |
| nat.res. | diffuse source of pollution | nichtpunktförmige Verschmutzungsquelle |
| nat.res. | diffuse source of pollution | diffuse Verschmutzungsquelle |