Yes, these findings can be due to sample contamination, especially because you have no urinary symptoms and your WBC count is normal. Bacteria/cocci and mucus in urine, by themselves, do not confirm a UTI. Collection-related contamination is quite common, particularly if the sample was not a properly collected midstream clean-catch specimen.
Next Steps
If you remain completely symptom-free, antibiotics are generally not required just because bacteria are seen in routine urine examination. You can repeat the urine routine examination with a properly collected early-morning, midstream clean-catch sample. A urine culture can be considered if bacteria persist on a properly collected repeat sample, if symptoms develop, or if you have specific risk factors where screening is recommended. You can consult me for further information.
Health Tips
For the repeat sample, clean the genital area, start urinating first and collect the midstream portion in a sterile container without touching the inside. Drink your usual amount of water rather than excessively increasing fluids. If you develop burning urination, urgency/frequency, lower abdominal pain, fever, chills, or back/flank pain, consult a doctor and consider urine culture before starting antibiotics.