Non-potable water

☣ biohazard ⚠ warning ⚠️ warning ☣️ biohazard ☢ radioactive ☢️ radioactive 📵 no mobile phones 🚫 prohibited 🚸 children crossing ⛔ no entry 🚳 no bicycles 🚭 no smoking 🚷 no pedestrians 🚯 no littering 🔞 no one under eighteen