| CHARLESTON WATER SYSTEM (SC1010001) | 327,422 | 22 | Detected |
| MT PLEASANT WATER WORKS (1010002) | 91,500 | 17 | Detected |
| ST JOHN'S WATER (SC1020002) | 22,592 | 19 | Detected |
| KIAWAH ISLAND UTILITY (SC1010008) | 9,550 | 5 | Detected |
| ISLE OF PALMS W/S COMM (SC1010004) | 9,530 | 32 | Detected |
| SEABROOK ISLAND TOWN OF (1010009) | 5,939 | 19 | Detected |
| FOLLY BEACH CITY OF (1010005) | 5,086 | 19 | Detected |
| SULLIVANS ISLAND TOWN OF (1010003) | 2,521 | 9 | — |
| LINCOLNVILLE TOWN OF (SC1010007) | 1,980 | 114 | — |
| AWENDAW TOWN OF (SC1010504) | 713 | 8 | — |
| E FRIERSON SCHOOL (SC1070115) | 281 | 5 | — |
| ST JAMES SCHOOL (SC1070143) | 240 | 27 | — |
| MINNIE HUGHES ELEMENTARY (SC1070124) | 227 | 12 | — |
| CAMP HO NON WAH (SC1070675) | 200 | 12 | — |
| CAPE ROMAIN SCHOOL (SC1070140) | 198 | 41 | — |
| BURBAGE MHP (SC1060063) | 171 | 33 | — |
| JERICHO TRAILER PARK (1060061) | 103 | 3 | — |
| JANE EDWARDS ELEMENTARY (SC1070122) | 100 | 6 | — |
| WA BURBAGE TRAILER PARK 1 (1060014) | 81 | 38 | — |
| EMS MEDIC 6/MAGISTRATE COURT (1079003) | 72 | 4 | — |
| DOLLAR GENERAL-MCCLELLANVILLE(SC1070008) | 60 | 48 | — |
| DEWEES UTILITIES (SC1050011) | 55 | 89 | — |
| THE BENT ROD (SC1070236) | 50 | 18 | — |
| WHOLE FOODS MKT CHAS (SC1080096) | 50 | 0 | — |
| CIRCLE K 2720878 (1070913) | 49 | 2 | — |
| T W GRAHAM CO (SC1072002) | 40 | 6 | — |
| WINDWOOD FARM HOME (SC1070963) | 33 | 47 | — |
| BERKELEY ELECTRIC COOP (1030028) | 32 | 6 | — |
| WADMALAW ISLAND COMM CTR (SC1070958) | 30 | 6 | — |
| DEAS RESTAURANT WATER SYSTEM (SC1072016) | 30 | 0 | — |
| CHARLESTON TEA GARDEN #1 (SC1030020) | 26 | 0 | — |
| ST JAMES-SANTEE FHC INC (SC1070006) | 26 | 38 | — |
| ADAMS RUN CIVIC CENTER (SC1070148) | 26 | 37 | — |
| MCCLELLANVILLE DINER (SC1070234) | 26 | 4 | — |
| OLD POST OFFICE RESTAURANT (SC1070247) | 26 | 29 | — |
| SCPRT-HAMPTON PLANTATION (1070600) | 26 | 12 | — |
| OAK PLANTATION CAMPGROUND (1070802) | 26 | 5 | — |
| SHREE FOOD MART (SC1070915) | 26 | 2 | — |
| ENK 878 (SC1070974) | 26 | 0 | — |
| BUCKSHOT RESTAURANT (SC1072010) | 26 | 11 | — |
| MT PLEASANT RO DISPENSING STA#1(1080032) | 26 | 0 | — |
| MT PLEASANT RO DISPENSING STA#2(1080033) | 26 | 0 | — |
| DEWEES ISLAND RO DIS STA (SC1080038) | 26 | 0 | — |
| EARTH FARE CHARLESTON (SC1080063) | 26 | 0 | — |
| WHOLE FOOD MARKET/MT PLEASANT (1080065) | 26 | 0 | — |
| MT PLEASANT RO DISPENSING STA#3(1080066) | 26 | 0 | — |
| PRIMO-WALMART 3367 (1080067) | 26 | 0 | — |
| PRIMO-WALMART 1748 (SC1080068) | 26 | 0 | — |
| EMS MEDIC 6/WTR DISPENSE (SC1080069) | 26 | 0 | — |
| PRIMO-FOOD LION 1097 (SC1080076) | 26 | 0 | — |