===Nitrates concentrations surface water===
|{{http://10.112.176.27:6080/arcgis/rest/services/Geoportail/Geoportail_2017/MapServer/192/images/1e13b1ce80fc1352e635ddeab38c0107/.png?nolink}}|0.00- 1.99 mg/l|
|{{http://10.112.176.27:6080/arcgis/rest/services/Geoportail/Geoportail_2017/MapServer/192/images/c0b20b24321101d19ea249784ada06bc/.png?nolink}}|2.00 - 9.99 mg/l|
|{{http://10.112.176.27:6080/arcgis/rest/services/Geoportail/Geoportail_2017/MapServer/192/images/97eb277cea918406acf872e01865ceb7/.png?nolink}}|10.00 - 24.99 mg/l|
|{{http://10.112.176.27:6080/arcgis/rest/services/Geoportail/Geoportail_2017/MapServer/192/images/e3cf02eef5d39a0a739489216379cc89/.png?nolink}}|25.00 - 39.99 mg/l|
|{{http://10.112.176.27:6080/arcgis/rest/services/Geoportail/Geoportail_2017/MapServer/192/images/c26b3ac6e0096b9d481f35ad5f2ccf75/.png?nolink}}|40.00 - 49.99 mg/l|
|{{http://10.112.176.27:6080/arcgis/rest/services/Geoportail/Geoportail_2017/MapServer/192/images/5f7133a6e40e5939ba1565ac78a0c0d4/.png?nolink}}|>50.00 mg/l|