Only Severn Trent and Wessex Water achieved the highest level of performance, with 4 star ratings from the EA. No river in England was found to be in a good overall state, amid concerns over the scale of sewage discharges and agricultural and industrial chemicals entering the water system. The EA performance assessment published on Friday revealed there were 2,204 pollution events last year  the highest number since 2014  marking the worst record for environmental pollution from the water industry for five years. The EA has been investigating Southern Water over serious failures in the operation of its sewage treatment sites. It was fined a record 126m last year over shocking failures at the companys sewage treatment sites that polluted rivers and beaches in southern England.
Only Severn Trent and Wessex Water achieved the highest level of performance.
( z0 achieve :ARG0 ( z1 and :mod ( z2 only ) :op ( z3 company :name ( z4 name :op "Severn" :op "Trent" ) ) :op ( z5 company :name ( z6 name :op "Wessex" :op "Water" ) ) ) :ARG1 ( z7 level :ARG1-of ( z8 have-degree :ARG2 ( z9 high :ARG1 z7 ) :ARG3 ( z10 most ) ) :mod ( z11 perform ) ) )
(z0 / achieve-01
    :ARG0 (z1 / and
              :mod (z2 / only)
              :op1 (z3 / company
                       :name (z4 / name
                                 :op1 "Severn"
                                 :op2 "Trent"))
              :op2 (z5 / company
                       :name (z6 / name
                                 :op1 "Wessex"
                                 :op2 "Water")))
    :ARG1 (z7 / level
              :ARG1-of (z8 / have-degree-91
                           :ARG2 (z9 / high-02
                                     :ARG1 z7)
                           :ARG3 (z10 / most))
              :mod (z11 / perform-02)))
Only Severn Trent and Wessex Water achieved the highest level of performance .
z4 :op1 0
z4 :op2 1
z1 :mod z2
z6 :op1 3
z1 :op1 z3
z3 :name z4
z5 :name z6
z1 :op2 z5
z6 :op2 2
z0 :ARG0 z1
z8 :ARG2 z9
z8 :ARG3 z10
z9 :ARG1 z7
z7 :ARG1-of z8
z0 :ARG1 z7
z7 :mod z11