World Water Monitoring Day is back again for its third year. Last year there were 4,842 sites registered in the US and 433 sites registered internationally. Missouri had 116 registered sites last year, with 40 of those being LVMP sites. Iowa had the most sites monitored with 643. Florida had the most participants with a whopping 14,635, compared to 352 in Missouri.

World Water Monitoring Day is somewhat different from the Secchi Dip-In, with the biggest difference being that the World Water Monitoring Day is, as you would expect, worldwide.

The “officially” monitored parameters include temperature, pH, turbidity, and dissolved oxygen. Test kits cost $19.95 (including shipping), but aren’t required. If you are a LMVP volunteer, you can use the thermometer and Secchi disk you already have to measure temperature and turbidity.

Though the official day is October 18, samples may be collected between September 18 and October 18.