| Business | Phone |
| Neu-Ion Inc 7200 Rutherford Rd # 100, Baltimore 21244 | (410) 944-5200 |
| G R Simpson & Co 4222 Ridgewood Ave, Baltimore 21215 | (410) 466-0809 |
| Rainsoft Baltimore Water 8019 Belair Rd, Baltimore 21236 | (410) 661-6005 |
| Industrial Chemical 1939 Hollins Ferry Rd, Baltimore 21230 | (410) 659-9800 |
| Caroy Environments 6824 Windsor Mill Rd, Baltimore 21207 | (410) 281-0985 |
| Dennis Chlorination Svc 4 Nashua Ct # 1, Baltimore 21221 | (410) 686-2401 |