Cost estimates are made for ultimate disposal of the contaminants resulting from complete renovation of a municipal waste water. For injection, these costs varied from $0.13 to $27 per 1,000 gallons injected (7,000 ft., 260 psi wellhead pressure, 1.187 fluid density) as the capability decreased from 2 million to 1,000 gallons per day. For cavities mined by conventional methods, fixed costs alone vary from $243 to $72 per 1,000 gallons at capabilities of 1,000 and 10 million gallons per day, respectively. Costs for disposal in cavities created by nuclear blasting are highly speculative. Fixed costs vary from $139 to $0.269 per 1,000 gallons as the capability increases from 1,000 to 10 million gallons per day. Spreading is by far the cheapest disposal method. Cost varied from $0.30 to $0.001 per 1,000 gallons as the capability varied from 1,000 (0.4-foot-per-day infiltration rate) to 10 million gallons per day (4.0-feet-per-day infiltration rate). Land costs between $25 and $1000 per acre were considered and, in this range, had very little effect on over-all cost.