R SEVERN (LOWER) HAW BRIDGE Monitoring Site

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Classification Item	2019	2022
1,2-dichloroethane	Good
Acid Neutralising Capacity	High
Aldrin, Dieldrin, Endrin & Isodrin	Good
Ammonia (Phys-Chem)	High	High
Arsenic	High
Atrazine	Good
Benzene	Good
Benzo(b)fluoranthene	Good
Benzo(g-h-i)perylene	Fail
Benzo(k)fluoranthene	Good
Biochemical Oxygen Demand (BOD)	High
Cadmium and Its Compounds	Good
Carbon Tetrachloride	Good
Chromium (VI)	High
Copper	High
DDT Total	Good
Dichloromethane	Good
Dissolved oxygen	High	High
Endosulfan	Good
Hexachlorocyclohexane	Good
Iron	High
Lead and Its Compounds	Good
Manganese	High
Nickel and Its Compounds	Good
Nonylphenol	Good
Pentachlorobenzene	Good
Pentachlorophenol	Good
Phosphate	Poor	Moderate
Simazine	Good
Temperature	High	Good
Tetrachloroethylene	Good
Tributyltin Compounds	Good
Trichlorobenzenes	Good
Trichloroethylene	Good
Trichloromethane	Good
Trifluralin (Priority hazardous)	Good
Zinc	High
para - para DDT	Good