Here is an update from the Organic Consumers Association:
Sewage sludge contains everything the sewage treatment plant was able to remove from the sewage - plus every new chemical and pathogen formed in the mad synergy of this chemical soup, including virulent, antibiotic-resistant bacteria created through horizontal gene transfer.
San Francisco public officials have helped the toxic sludge industry score a major victory in the Bay Area, where they've been able to convince hundreds of regional (non-organic) farmers to spread the hazardous material on farm land and pasture, and have actually been able to get city residents to take hundreds of thousands of pounds of toxic sludge and spread it over their backyard and community gardens.
San Francisco is a strategic battleground to stop the sludge industry from poisoning more farms and communities. In 1998 the organic community rose up and banned the use of sewage sludge in organic farming. Now it's time to ban its use on farms, gardens, lawns, and land in general.