| Business | Phone |
| City Ems 411 E San Patricio Ave, Mathis 78368 | (361) 547-3995 |
| George P Morrell Sr Water Plnt 1881 Fm 534, Mathis 78368 | (361) 547-9570 |
| Gregorio Martinez Community 123 E Laredo St, Mathis 78368 | (361) 547-6232 |
| Public Works Dept 131 W Freeman St, Mathis 78368 | (361) 547-5951 |
| Mathis Water Filtration Plant 25 Park Rd, Mathis 78368 | (361) 547-6991 |