City of Lawton
Industrial Pretreatment Program
Local Limits
Local Limits
Local limits are wastewater limitations that apply to commercial and industrial facilities that discharge to a publicly owned treatment works (POTW). Local limits are developed to meet the pretreatment program objectives and site-specific needs of the local POTW and the receiving stream. Local limits control the pollutants in the wastewater discharges from commercial and industrial facilities and apply at the "end-of-pipe" from the facility. The regulations under 40 CFR §403.5(d) give the POTW the authority to enforce its local limits.
| Parameter | Surcharge | Violation |
| pH | <6.0 or >9.0 su | |
| BOD | 750mg/L | 993mg/L |
| TSS | 500mg/L | 777mg/L |
| FOG | 200mg/L | 400mg/L |
| Ammonia | 25mg/L | 32.13mg/L |
| Arsenic | 0.11mg/L | |
| Cadmium | 0.01mg/L | |
| Chromium | 1.01mg/L | |
| Copper | 0.68mg/L | |
| Lead | 0.08mg/L | |
| Mercury | <0.0002mg/L | |
| Nickel | 0.67mg/L | |
| Selenium | 0.07mg/L | |
| Silver | 0.20mg/L | |
| Zinc | 1.10mg/L | |
| Cyanide | 0.11mg/L | |
| Phenol | 75.0mg/L | |
| Chloride | 1046mg/L | |
| DCBM | 0.04mg/L | |
| Molybdenum | 0.98mg/L |