In drinking water, special attention should be paid to such substances as nitrate, nitrite, ammonium, iron, total microbial count, and the number of coliform bacteria in the water.
Nitrate is almost always found in groundwater to a greater or lesser extent. Nitrate itself is not toxic. However, nitrate and iron compounds in water can provide a breeding ground for bacteria, some of which can produce toxins.
If coliform bacteria or high total cell count are found in drinking water, this is a sign that the water is contaminated and there is a risk of infection for pigs.
The farm water pipe also poses a risk of contaminating drinking water. Bacteria enter the system through drinking valves, through dust in open water tanks, or various dispensing equipment.
The high temperature in the stable, as well as the relatively low flow rate of water during rearing, as well as at night, provide good conditions for the growth of bacteria.
Between groups, drinking water may remain in the pipes for several days or a week before the pigs begin to drink. Therefore, it is always important to make sure that the “old” water is drained through pipes both in the farrowing area and in the nursery before placing the animals for ex. with the usage of clamps (source svineproduktion.dk).
If poor water quality is suspected, a sample is first taken for bacteriological and nitrate analysis. The water sample must be taken from the sections where there are problems. A water sample is taken where the animals drink, but this must be done without contaminating the water sample with other substances such as manure, etc.
If tests indicate contamination of the pipe system, cleaning and disinfection should be considered.
Consider acid on water:
- Add 1,0 per mille Multicid in the same period as when the piglets used to get zinc oxide
- 2,0 per mille at a high level of bacteria