Table 1. Test Methods Evaluated, with Range and Measurement Increment.

Test	Manufacturer	Test Method	Range (mg/L)	Measurement Increment (mg/L)
Digital Titration	Hach Company	Titration	20–70000	2.5
WataTest	Antenna	Titration	1000–7000	500
Pooltester (Cylinder Dilution)	Palintest	DPD	0–6	Low level: 0.1, High level: 0.5
Pooltester (Pipette Dilution)	Palintest	DPD	0–6	Low level 0.1, High level 0.5
Color Wheel (Cylinder Dilution)	Hach Company	DPD	0–3.4	0.2
Color Wheel (Pipette Dilution)	Hach Company	DPD	0–3.4	0.2
Indigo	Indigo Labs	Test Strip	0–10,000	0, 1000, 2500, 5000, 7500, 10000
Activate	Activate	Test Strip	0–10,000	0, 1000, 2500, 5000, 7500, 10000
Precision Extra	Precision Labs	Test Strip	0–10,000	0, 1000, 2500, 5000, 7500, 10000
Serim	Serim Monitor	Test Strip	100–750	100, 200, 350, 500, 750
Precision High	Precision Labs	Test Strip	0–1,000	0, 50, 100, 250, 500, 1000
WW Ultra I	Waterworks	Test Strip	0–750	0, 25, 100, 200, 300, 400, 500, 750
WW Ultra II	Waterworks	Test Strip	0–2,000	0, 25, 50, 200, 500, 800, 1100, 1500, 2000
InstaTest	LaMotte	Test Strip	0–800	0, 50, 100, 250, 500, 800