LABORATORY TESTING SERVICES

Parameter	Unit	Method
Total Solids, TS	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF,23rd ed., 2017, Part 2540 B.
Total Suspended Solids, TSS	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, Part 2540 D.
Total Dissolved Solids, TDS	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, Part 2540 C.
Total Volatile Solids, TVS	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, Part 2540 E.
Settleable Solids, SS	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, Part 2540 F.
ปริมาณของแข็งแขวนลอยระเหยได้ (Volatile Suspended Solids, VSS)	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, Part 2540 E.

Parameter	Unit	Method
ซีโอดี (Chemical Oxygen Demand, COD)*	mgO2/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, Part 5220 D.
ไนไตร์ท (Nitrite, NO2-)	mg/L	Ferrous sulfate method by HACH DR 3900
ไนเตรต (Nitrate, NO3-)	mg/L	Cadmium Reduction method by HACH DR 3900
ปริมาณฟอสฟอรัสทั้งหมด (Total Phosphorus, TP)	mg/L	In-house method based on APHA, AWWA & WEF, 23rd ed., 2017, Part 4500-P.
ปริมาณไนเตรเจนในรูปทีเคเอ็น (Total Kjeldahl Nitrogen, TKN)	mg/L	In-house method based on APHA, AWWA & WEF, 23rd ed., 2017, Part 4500-Norg C.
ซัลไฟด์ (Sulfide)	mg/L S2-	Methylene Blue Colorimetric Method by HACH, 8131
คลอรีนอิสระ (Free Chlorine)	mg/L Cl2	USEPA DPD Method, HACH 8021 and 10069
คลอไรด์ (Chloride)	mg/L Cl-	In-house method based on AWWA-2017, Part 4500 B.
ปริมาณออกซิเจนที่จุลินทรีย์ใช้ในการย่อยสลายสารอินทรีย์ (Biological Oxygen Demand, BOD)	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, 4500-O G. and 5210 B.
แอมโมเนีย-ไนโตรเจน (NH3-N	mg/L	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, Part 4500 – N org C.

Parameter	Unit	Method
โคลิฟอร์มทั้งหมด (Total Coliform)	MPN/100 mL ,MPN/g dry weight	In-house method based on AWWA-2017, Part 9221 B.
ฟีคอลโคลิฟอร์ม (Faecal Coliform)	MPN/100 mL ,MPN/g dry weight	In-house method based on AWWA-2017, Part 9221 E.
เอสเชอริเชีย โคไล (Escherichia coli)	MPN/100ml ,MPN/g dry weight	In-house method based on AWWA-2017, Part 9221 F.
เอสเชอริเชีย โคไล (Escherichia coli)	CFU/100 mL ,CFU/g dry weight	In-house method based on AWWA-2017a, Part 9221: Colony-count technique.
Clostridium Perfringens	CFU/100 mL ,CFU/g dry weight	In-house method based on ISO 7937 (2004) และ ISO 14189 (2013).
แบคเทอริโอเฟจ MS2 (Bacteriophage MS2)	PFU/mL PFU/g dry weight	In-house method based on EPA-2001, Part 1601.
ไข่พยาธิและปรสิต (Helminth egg and Helminth egg)	No. egg/L No. egg/g dry weight	In-house method based on SOP Helminth Test (Ascaris, Trichuris and Taenia), University of Kwazulu-Natal (2008).
สกัดดีเอ็นเอ (DNA extraction)	-	Phenol- chloroform method and DNeasy PowerSoil kit.

Parameter	Unit	Method
pH	-	pH meter
Dissolved Oxygen	mg/L	Dissolved Oxygen (DO) meter
Oxidation-reduction potential, ORP	mV	Oxidation-reduction potential (ORP) meter
Conductivity	μS/cm	Conductivity meter
อุณหภูมิ (Temperature)	°C	Standard Methods for the Examination of Water and Wastewater, APHA, AWWA & WEF, 23rd ed., 2017, 2550 B.