What does it mean when i have bacteria in my urine?

Doesn't mean much: Bacteria is sometimes found in urine for a variety of reasons. Bacteria is often a contaminant. Bacteria is only significant when the patient has signs and symptoms of infection ( burning, frequency, urgency, pressure in the bladder, fever, etc.) or when the organism is clearly a pathogenic organism - such as pseudomonas - and has no business in the urine.

How many: More than 10,000 organism per mL is abnormal, greater than 100,000 bacteria per ml usually means urinary tract infection.