Nitrates are like that house guest who shows up uninvited and keeps raiding your fridge. They sneak in from fertilizers, septic systems, or even animal waste, hitching a ride straight into your groundwater. While they’re harmless in small amounts, too many nitrates can mess with your blood’s oxygen flow, which is especially bad for babies and pets.
Imagine your body’s red blood cells are little Uber drivers. Nitrates hop in, change the destination, and suddenly your oxygen is stuck in traffic. That’s why the EPA sets a strict limit of 10 mg/L—anything higher, and you’ve got a problem.