Watersheds and Rivers Testing

Watersheds refer to rivers, streams, lakes and the terrestrial networks around them. As a source of drinking water and domestic water, as well as a source of irrigation water in many areas, the water quality of the watersheds and rivers can make an effect on the health of human beings. In addition to natural sources of pollution such as animal waste, many watersheds and rivers are subject to some human-induced pollution caused by modern urban development, such as industrial wastewater, plastic waste, etc.

STEMart can provide you with a variety of testing services to track the water quality of a watershed over time, and to compare the water quality upstream and downstream to locate a possible source of pollutants along a river or stream.

Test Capabilities

Physical and chemicals analysis

• Detection objectives include: pH, color, odor, turbidity, conductivity, total hardness, total alkalinity, suspended solids, total dissolved solids, dissolved oxygen, phosphate, benzene (BTEX), total nitrogen, total organic carbon, petroleum and animal and vegetable oils, anionic surfactants, asbestos, nitrate/nitrite, cyanide, fluoride, etc.

Inorganic anion

• Detection objectives include: Sulfate, cyanide, fluoride, chloride, bromide, iodide, carbonate, bicarbonate, etc.

Nutrients and organic indicator

• Detection objectives include: Ammonia nitrogen, permanganate index, chemical oxygen demand (CODCr), biochemical oxygen demand (BOD5), nitrate (in terms of N), nitrite (in terms of N), etc.

Metal analysis

• Detection objectives include: As, Hg, Cr⁶⁺, Pb, Zn, Cu, Cd, Fe, Mn, Co, Ni, Mo, Be, Ba, K, Na, Ca, Mg, etc.

Microbial contamination analysis

• Detection objectives include: Total coliforms, total colonies, Escherichia coli, thermotolerant coliforms, Staphylococcus aureus, etc.

Antibiotic content detection

• Detection objectives include: Oxytetracycline, tetracycline, doxycycline, ciprofloxacin, norfloxacin, sulfamethoxazole, etc.

Organic pollutant detection

• Detection objectives include: Naked eye visible substances, volatile phenols, polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCBs), adsorbable organic halides, volatile halogenated hydrocarbons, organochlorine pesticides, organophosphorus pesticides, volatile organic compounds (VOCs), semi-volatile organic compound (SVOCs), dioxins, total petroleum hydrocarbons (TPH), etc.

Disinfection by-products analysis

• Detection objectives include: Bromate, dichloroacetic acid, bromodichloromethane, dichloroacetonitrile, chlorate, NDMA, trichloroacetic acid, chlorite, chloroform, chloroacetic acid, Bromodichloromethane (BDCM) – CHCl₂Br, Dibromochloromethane (DBCM) – CHClBr₂, cyanogen chloride, dibromoacetonitrile, dibromochloromethane, Bromoform – CHBr₃

Perfluoroalkyl and polyfluoroalkyl substances analysis

• Detection objectives include: PBA (Perfluorobutanoic acid), PFPeA (Perfluoropentanoic acid), PFHxA (Perfluorohexanoic acid), PFDA (Perfluorodecanoic acid), PFUnA (Perfluoroundecanoic acid), PFDoA (Perfluorododecanoic acid), PFTrDA (Perfluorotridecanoic acid), PFTeDA (Perfluorotetradecanoic acid), PFTeDA (Perfluorotetradecanoic acid), PFBS (Perfluorobutanesulfonate), PFHpS (Perfluoroheptanesulfonate), PFDS (Perfluorodecanesulfonate), PFOSA (Perfluorooctanesulfonamide), PFOA (Perfluorooctanoic acid), PFOS (Perfluorooctane sulfonic acid), PFHxS (Perfluorohexane sulfonic acid), PFHpA (Perfluoroheptanoic acid), PFNA (Perfluorononanoic acid)., etc.

Dioxins analysis

Residues detection

• Detection objectives include:
  • General herbicide: Alachlor, Atrazine, Benefin, Bromacil, Butachlor, Butylate, Cycloate, Eptam (EPTC), Ethalfluralin, Hexazinone, Isopropalin, Metolachlor, Metribuzin, Molinate, Norflurazon, Oxadiazon, Oxyfluorfen, Pebulate, Pendimehtalin, Prodiamine, Profluralin, Prometon, Propachlor, Propazine, Simazine, Terbacil, Trifluralin, Vernolate
  • Phenoxy herbicide: 2,4,5 – TP, 2,4,5-T, 2,4-D, 2,4-DB, Dicamba, Dichlorprop, Dinoseb, MCPA, MCPP, Picloram, Trichlopyr
  • Chlorinated pesticide: 4,4-DDD, 4,4-DDE, 4,4-DDT, Aldrin, Alpha-BHC, Alpha-Chlordane, Beta-BHC, Delta-BHC, Dieldrin, Endosulfan I, Endosulfan II, Endosulfan Sulphate, Endrin, Endrin Aldehyde, Endrin Ketone, Gamma-BHC, Gamma-Chlordane, Heptachlor, Heptachlor Epoxide, Methoxychlor, PBCs, Toxaphene

For more information about our watersheds and rivers testing services, please contact us.