About This ✔EASY TO USE: Easy to follow instructions included. Requires no external, harsh chemicals ✔COMPLETE KIT: Comes with all the materials required to test for 16 of the US EPA’s top water quality parameter concerns ✔ HIGHEST QUALITY: ITS, manufactures water testing products in their USA facility in an environment that allows for reproducibility, accuracy, and traceability based on Good Manufacturing Practices ✔ACCURATE AND RELIABLE: Components are tested by Quality Control personnel at each step and are rejected if they are outside of specifications. Standards are prepared using calibrated equipment, and concentrations are confirmed by recognized reference methods ✔DETECTION LEVELS: Detects: pH: 2. 0, 4. 0, 5. 0, 6. 5, 8. 5, 9. 5, 10. 5, 12. 0--- Total Alkalinity: 0, 40, 80, 120, 180, 240, 500 ppm--- Total Chlorine: 0, 0. 2, 1. 0, 4. 0, 10. 0 ppm--- Total Hardness: 0, 50, 120, 250, 425, 1000 ppm--- Free Chlorine: 0, 0. 05, 0. 2, 0. 6, 1. 5, 4. 0, 10 ppm--- Chloride: 0, 250, 500 ppm--- Sulfate: 0, 250, >500 ppm--- Nitrate (as N): 0, 2, 10, 20, 50 ppm--- Nitrite (as N): 0, 0. 2, 1, 1. 5, 3. 0 ppm--- Copper: 0. 0, 0. 1, 0. 5, 1. 0, 2. 0 ppm--- Iron (Fe+2): 0. 0, 0. 05, 0. 1, 0. 3, 1. 0 ppm--- Bacteria: Positive/Negative--- Hydrogen Sulfide: 0, 0. 3, 0. 5, 1, 2 ppm--- Lead: Positive/Negative--- Pesticide: Positive/Negative--- Heavy Metals: