| Business | Phone |
| Armstrong Associates 1362 Linwood Dr, Holland 49424 | (616) 786-0805 |
| Canney's Water Treatment Holland 49423 | (616) 546-4426 |
| Ecowater Systems 1120 S Washington Ave, Holland 49423 | (616) 392-7985 |
| Warren Aing & Assoc Inc 4140 65th St, Holland 49423 | (616) 335-2222 |
| Licensing Resource Grp 426 Century Ln, Holland 49423 | (616) 395-0676 |
| De Vries & De Vries 3153 E Crystal Waters Dr, Holland 49424 | (616) 399-4067 |
| Spring Brook Water Treatment 11291 E Lakewood Blvd, Holland 49424 | (616) 396-1996 |