| Business | Phone |
| Humboldt Water Resources 1068 I St, Arcata 95521 | (707) 826-2869 |
| Northcoast Environmental Center 575 H St, Arcata 95521 | (707) 822-6918 |
| Six Rivers Restoration 1688 29th St, Arcata 95521 | (707) 668-1821 |
| Twin Parks 1301 Sunset Ave, Arcata 95521 | (707) 822-1728 |
| Ca Environmental Testing 1415 Old Arcata Rd, Arcata 95521 | (707) 826-1447 |
| Gainer & Assoc 1175 G St, Arcata 95521 | (707) 822-4448 |
| Galea Wildlife Consulting 5440 Ericson Way, Arcata 95521 | (707) 464-3777 |
| Gess Environmental Arcata 95521 | (707) 840-9676 |
| Trinity Associates 980 7th St, Arcata 95521 | (707) 825-8770 |
| Stillwater Ecosystem Watershed 850 G St # K, Arcata 95521 | (707) 822-9607 |
| Redwood Coast Assoc Arcata 95521 | (707) 822-4496 |
| Legacy The Landscape Cnnctn 830 G St # 230, Arcata 95521 | (707) 826-9408 |
| Mc Bain & Trush 824 L St # 5, Arcata 95521 | (707) 826-7794 |
| Mfg Inc 875 Crescent Way, Arcata 95521 | (707) 826-8430 |