How can ua wbc be contaminated. all my other levels for urine where negative. but the range of my ua wbc was 5-10 & its supposed to be 0-5.

Here are some...: Urine contamination with vaginal discharge is common if not collected carefully as instructed, especially in the sexually active with overweight leading to somewhat difficult to separate the lips of vagina for cleansing to collect desired mid-stream urine specimen. That is why it is common to have contamination in the setting as described above.