Can be iron or other sediment or tannin. If it persists take a sample for analysis and then you will know if and what kind of filter to get.
from the water picking up brown sediment, i.e. dirt
Rain disturbes the silt at the bottom and causes it to rise in the water amking the murky-brown colour.
'Brown' may be caused by a number of things. Most likely cause is iron in your water, which is very common.
When iodine is mixed with water, it forms a solution that appears brown due to the interaction between iodine molecules and water molecules. The brown color comes from the absorption of light by the iodine molecules, which causes them to appear brown to our eyes.
Skidmarks account for 84.7% of all brown marks in a toilet bowl . Followed in a distant second place by Iron in your water.
The potential causes of brown sludge in a water softener tank can be due to the accumulation of iron or manganese in the water supply. Solutions include regular cleaning of the tank, using a water softener cleaner, or installing a pre-filter to remove these minerals before they enter the tank.
Usually iron
See the related link on what causes brown discharge after period.
Possibly your hot water tank is rusting out on the inside and will need replacement soon.
If the plumbing in your house is old, it is probably rusty water pipes or rust from within the Hot Water heater. Des Perado
Tea is usually a lightly colored watery looking yellow, green, or brown.
Brown tide is primarily caused by excess nutrients such as nitrogen and phosphorus in the water. These nutrients can come from sources like fertilizer runoff, sewage discharge, and agricultural activities. The increase in nutrients leads to the rapid growth of algae, specifically the species Aureococcus anophagefferens, which causes the discoloration of the water.