For those interested in reading Jantingercat's water quality report in the city of Mannheim, Germany, the values that are from the test sample look like they're under the column that says, "Trinkwasser Rheinau".
Trinkwasser = drinking water
Rheinau is probably referring to the Rhein River.
The water parameters of interest are:
Plant macronutrients:
Ammonium (NH₄⁺): <0.01 mg/L
Nitrit = nitrite (NO2−): <0.05 mg/L
Nitrat = nitrate (NO3-): 22 mg/L
Phosphat = phosphate (PO₄³⁻): <0.5 mg/L
Kalium = potassium (K): 2.19 mg/L
Sulfat = sulfate (SO₄²-): 81 mg/L
Calcium (Ca): 108 mg/L
Magnesium (Mg): 21.1 mg/L
Hydrogenkarbonat (berechnet) = hydrogen carbonate (calculated) = bicarbonate (calculated) [HCO3-]: 325 mg/L
https://www.extension.uidaho.edu/pub...IS/CIS1124.pdf
Concentration of Calcium & Magnesium in the water:
Gesemtharte = overall hardness = general hardness (GH): 19.9 dH
Gesemtharte (berechnet) = general hardness (calculated): 3.56 mmol/L [mmol/L = millimols/Liter]
Plant micronutrients:
Chlorid = chloride (Cl): 45 mg/L
Eisen = iron (Fe): <0.007 mg/L
Kupfer = copper (Cu): <0.002 mg/L
Mangan = manganese (Mn): <0.002 mg/L
Nickel (Ni): <0.002 mg/L
Bor = Boron (B): 0.046 mg/L
https://www.extension.uidaho.edu/pub...IS/CIS1124.pdf
Elements plants can uptake, but it's not clear as to their benefits:
Strontium (Sr): 0.27 mg/L
Uptake of Stable Strontium by Plants and Effects on Plant Growth | SpringerLink
Selen = selenium (Se): <0.001 mg/L
Frontiers | An Overview of Selenium Uptake, Metabolism, and Toxicity in Plants | Plant Science
"Non-essential" element, but still plays a role for plants:
Natrium = sodium (Na): 29.4 mg/L
Plants and sodium ions: keeping company with the enemy
Toxic elements/compounds to plants:
Antimon = antimony (Sb): <0.0005 mg/L
Arsenic (As): <0.001 mg/L
Benzol = benzene (C6H6): <0.5 micrograms/L
Blei = lead (Pb): <0.001 mg/L
Cadmium (Cd): <0.0005 mg/L
Chromium (Cr): <0.002 mg/L
Fluoride (F): <0.15 mg/L
Herbicides:
Atrazin = atrazine (herbicide): <0.05 micrograms/L
to
Triallat = triallate (herbicide): <0.05 micrograms/L
Note: The numerical values are those that were present in the water sample being tested. It
does not reflect the concentrations needed by plants [orchids].