Water Systems Serving Zip Code 78666
Not sure which system is yours? Most residents in ZIP 78666 are likely served by City of San Marcos (population served: 72,970). Check your water bill for your provider name if you're unsure.
Direct EPA ZIP Matches
11 active water systems have this ZIP in EPA records.
| Water system | Serves | Source | Violations | What kind |
|---|---|---|---|---|
| Crystal Clear Sud | 20,766 | Surface Water Purchased | 143 | 6 over limit |
| Texas State University - San Marcos | 43,552 | Groundwater | 16 | |
| Promiseland Church San Marcos | 625 | Groundwater | 8 | 1 over limit |
| San Marcos Baptist Academy | 450 | Groundwater | 8 | |
| City of San Marcos | 72,970 | Surface Water | 5 | 1 over limit |
| Wonderland School Water System | 206 | Groundwater | 10 | |
| Middleton Brewing | 37 | Groundwater | 2 | |
| Roughhouse Brewery | 50 | Groundwater | 1 | |
| Texas State University - Freeman Center | 150 | Groundwater | 0 | none on record |
| Alliance Regional Water Authority 1b | 0 | Groundwater Purchased | 0 | none on record |
| Alliance Regional Water Authority | 0 | Surface Water Purchased | 0 | none on record |