Water Quality for a particular sample
| A. Indicatorii Fizico-Chimici conf. Hg 1020/2005 (Romanian Government standards for water) | |||||||
|---|---|---|---|---|---|---|---|
| Nr. crt. | Indicatori | Simbol | Exprimarea rezultatului | Limita de detectie | Concemntratia maxima admisa (CMA) | Valoare | Comment |
| 1 | Conc. ionilor de hidrogen | pH | - | 0,10 | - | 9,00 | Very mildly alkaline. Municipal water suppliers often raise the pH of drinking water to prevent corrosion of pipes, often to pH 9, Addy et al. (2004) Good for growth of mussels and snails. |
| 2 | Conductivitate | - | μS/cm | 0,50 | - | 1536 | Conductivity is linked directly to the total dissolved solids (T.D.S.). High quality deionized water has a conductivity of about 5.5 μS/m, typical drinking water is in the range of 5-50 μS/m, while sea water is about 51 000 S/m. This water is not quite brackish, which is defined as 1600 μS/m. The desirable range for fish is 100 - 2000 μS/m Stone et al. (2000) |
| 3 | Cloruri | Cl- | mg/l | 0,5 | - | 41,13 | This level is low compared to the level of Sodium in the water, which in this water sample is more closely associated with the level of sulphate radicals. |
| 4 | Sulfati | SO42- | mg/l | 2 | - | 236,3 | This is just below the maximum allowable level for human drinking water, and is not a problem for wildlife, which can tolerate very much higher (~ 3000 mg/l) levels without adverse effects. |
| 5 | Hidrogencarbonat | HCO3- | mg/l | 3 | - | 488,1 |
In freshwater ecology, strong photosynthetic activity by freshwater plants in daylight releases gaseous oxygen into the water and at the same time produces bicarbonate ions, which are a normal component in such waters. |
| 6 | Calciu | Ca2+ | mg/l | 0,01 | - | 23,95 | This would be classified as 'hard' water. Calcium is a dietary requirement for most organisms. Calcium carbonate is a building stone of skeletons of most marine organisms, and eye lenses. Calcium phosphate is required for bone structure and teeth structure of terrestrial organisms. Calcium is largely responsible for water hardness, and may decrease toxicity of other compounds. Elements such as copper, lead and zinc are much more toxic in soft water. Consequently, hard water better protects fishes from direct deleterious metal uptake. |
| 7 | Magneziu | Mg2+ | mg/l | 0,01 | - | 5,30 | Calcium and magnesium are essential to fish for metabolic reactions such as bone and scale formation. |
| 8 | Sodiu | Na+ | mg/l | 0,01 | - | 264,40 |
This level of Sodium is not a problem in a fresh water ecology situation. |
| 9 | Potasiu | K+ | mg/l | 0,01 | - | 3,29 |
This level of Potassium is within normal levels for drinking water |
| 10 | Fier total | Fe | mg/l | 0,001 | - | 13,18 |
Iron is an important water quality variable in the growth of fish. It is a dissolved nutrient required in small quantities by both aquatic plants and animals. |
| 11 | Reziduu sec | RF | mg/l | 0,01 | - | 1240 |
Residual dry matter after testing, presumably organic matter. |
| 12 | Oxigen dizolvat | O2 | mg/l | 3 | - | 10,37 |
This is an excellent result, and shows that the water contains the maximum possible level of dissolved oxygen, a good indicator of the excellent health of the ecosystem. |
| 13 | Dioxid de carbon liber | CO2 | mg/l | 3 | - | < 3 |
This is an excellent result, and shows that the water contains undetectable levels of dissolved carbon dioxide, a good indicator of the excellent health of the ecosystem. |
| 13 | Hidrogen sulfurat | H2S | mg/l | 0,05 | - | < 0,05 |
This is an excellent result, and shows that the water contains undetectable levels of dissolved hydrogen sulfide, or rotten egg gas, a good indicator of the excellent health of the ecosystem. |