Brighton and Hove City Council has failed to meet its performance targets involving children, carbon and crime for the last six months.

The council has been slammed by the opposition after falling short cutting carbon emissions, raising school attainment and tackling violent crime.

Other areas falling short include children in care and complaints to the council.

GCSE targets were also not met as only 22% of pupils receiving free school meals achieved five A* to C grades against a target of 38% – as compared to 31% in the previous year.

Only 53% of all pupils reached that GCSE standard with a target of 62% – falling beneath previous year’s figure of 68%.

Conservative councillor Andrew Wealls said the GCSE results were “incredibly disappointing”.

The council said changes to the exams had affected the results.

The report listed a spike in violent crime, up to 1,196 over their target of 739, as due to improvements in recording crime.

Figures published in the report from 2011/12 showed the council targeted a 28% reduction in emissions but attained 17.6% - putting it below national performance levels and seeing an increase over previous levels of 0.4 tonnes of emissions per person.

Conservative councillor Tony Janio said: “Greenhouse gas emissions will remain too high whilst the two left wing parties insist on keeping hold of so many old inefficient buildings.”

The council blamed this increase on the “severity of winters”.

Councillor Warren Morgan, leader of the Labour and Co-operative Group, said: “The Greens promised a lot but in so many crucial areas, like providing more school places, keeping our streets clean and building more homes, they have let us down.”

The council met or exceeded 48% of its targets but fell short on 50% of them while 2% of the data is unavailable.

They were close to target on 34% and off target on 16%.

Councillor Jason Kitcat, leader of the council, said: “The majority of indicators are on track, which is good news given cuts to our funding and growing demands for our services.”

Targets were exceeded in areas such as a reduction in alcohol related hospital admissions, prosecutions for hate crime and permanent residences for people in care.

A council spokeswoman said: “We were pleased to see that overall the results are broadly positive with 82% of the indicators meeting or being within the agreed tolerance level at this point in the year.

“However, we are aware that there are areas of concern and are putting together robust plans to tackle those issues highlighted in the report.”

The full report is available on the city council’s website and will go forward for discussion at the Policy and Resources Committee meeting today.