Allegations of corruption. In September 2010, Water Minister Charity Ngilu admitted in Parliament that corruption was rampant in public water institutions, including all the eight water services boards and the National Water and Conservation Pipeline Corporation. The Kenya Water and Sanitation Civil Society Network (Kewasnet) called the statement the "height of hypocrisy and double standards", claiming that the Minister had only talked publicly about corruption in the sector after the Daily Nation newspaper had uncovered the corruption. Shortly before the chief executive officer of the Tanathi Water Services Board had been suspended after a WASREB audit of the board alleging corruption. The report had been published in March 2010 without action being taken for six months. According to Kewasnet, "governance in the water sector is at its worst and lowest ebb." Feedback from consumers. In 2010 WASREB and local utilities helped to establish Water and Sanitation Action Groups (WAGs) consisting of citizen volunteers in Kisumu, Kakagemam, Nairobi and Mombasa to provide a forum for dialogue and for feedback from consumers. Consumer complained about inaccurate billing and metering, pipe bursts, illegal connections, poor workmanship on installations, vandalism, overcharging and corruption. Utility staff were initially suspicious and even hostile. The feedback was done in the form of focus group discussions, public hearings and scheduled meetings between citizen representatives and utility managers. While 63% of the complaints were resolved after 8 months, it remains to be seen if the system will become permanent or will be extended to other cities. The economic performance of Kenyan Water Service Providers is closely monitored by WASREB and made available in the "Impact Report" to encourage competition and spread best practices. Important indicators of economic efficiency are: collection rates, the level of non-revenue water, metering ratios and labour productivity. Most Kenyan Water Service Providers do not meet the benchmarks in these dimensions. Collection rate. In 2013-14 most Kenyan WSPs recorded good revenue collection efficiencies with an average of 93%, up from 86% in 2006–07. The worst performing utility was Mawingo with 40% of the billed amount being collected. In some utilities, the collection rate exceeded 100% because WSPs were able to collect outstanding arrears. Non-revenue water. On average, 42% of the supplied water in Kenya was not billed in 2013–2014, e.g. due to leakage or water theft. Only one Water Services Providers (Nyeri) met the benchmark set by the Ministry of Water and Irrigation with levels of NRW of less than 20%.