Public water system
St John'S Water (Sc1020002)
PWSID SC1020002 - Charleston County, South Carolina
29 PPM
1.7 GPG
Soft0Soft60120180300+
Soft (29 PPM)Verified - Annual Water Quality Report
System Details
- Water source
- surface water
- Population served
- 22,592
- Service connections
- 9,724
- Status
- Active
Hardness Evidence
- Reported hardness
- 29 PPM
- Grains per gallon
- 1.7 GPG
- Data source
- Annual Water Quality Report
- Source year
- N/A
- Raw/source estimate
- 47 PPM
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 29401 | Charleston, SC | Soft (29 PPM) |
| 29403 | Charleston, SC | Soft (29 PPM) |
| 29404 | Charleston, SC | Soft (29 PPM) |
| 29405 | Charleston, SC | Soft (29 PPM) |
| 29406 | North Charleston, SC | Soft (29 PPM) |
| 29407 | Charleston, SC | Soft (29 PPM) |
| 29412 | Charleston, SC | Soft (29 PPM) |
| 29414 | Charleston, SC | Soft (29 PPM) |
| 29418 | Charleston, SC | Soft (29 PPM) |
| 29426 | Jericho, SC | Soft (29 PPM) |
| 29429 | Awendaw, SC | Soft (29 PPM) |
| 29438 | Edisto Island, SC | Soft (34 PPM) |
| 29439 | Folly Beach, SC | Soft (29 PPM) |
| 29449 | Meggett, SC | Soft (29 PPM) |
| 29451 | Isle Of Palms, SC | Soft (29 PPM) |
| 29455 | Johns Island, SC | Soft (29 PPM) |
| 29458 | Mc Clellanville, SC | Soft (29 PPM) |
| 29464 | Mount Pleasant, SC | Soft (29 PPM) |
| 29466 | Isle Of Palms, SC | Soft (29 PPM) |
| 29470 | Ravenel, SC | Soft (29 PPM) |
| 29482 | Sullivans Island, SC | Soft (29 PPM) |
| 29487 | Wadmalaw Island, SC | Soft (29 PPM) |
How to Use This System Page
A public water system can serve multiple ZIP codes and cities. Use this page to inspect the source behind the hardness reading, then open the linked ZIP or city page for the local rollup.
If you are sizing treatment equipment, confirm your actual tap hardness with a home test or lab test before buying.