EPA data as of Oct 2026 · page updated 2026-10-30
South Carolina: drinking water & radon
South Carolina has 555 active community water systems. Since 2016, 108 reported health-based violations; 4 had a latest lead result above 15 ppb; 68 measured PFOA or PFOS at or above 4 ppt.
Water systems555
With violations108
Radon zone 1 ZIPs33
ZIPs likely on wells77
Radon zones in South Carolina
tap a countyZone 1 · highestZone 2 · moderateZone 3 · low
Most health-based violations
| Sandy Run MHP (Sc0860037) 41 people | 18 |
| Saluda Co W&S Authority (Sc4120001) 5,060 people | 18 |
| Saluda CPW (Sc4110001) 3,390 people | 11 |
| Lockhart Town of (Sc4420010) 496 people | 10 |
| Mccormick Co W&Sa (Sc3520002) 8,500 people | 10 |
| Cheraw Town of (Sc1310001) 6,325 people | 9 |
| Dewees Utilities (Sc1050011) 55 people | 9 |
| Hemingway Town of (Sc4510004) 3,191 people | 7 |
| Aiken City of (Sc0210001) 51,533 people | 7 |
| Carlisle Town of (4410003) 555 people | 6 |
Highest latest lead (90th percentile)
| BGWC Westside Terrace (3250002) 172 people | 40 ppb |
| Fishing Creek Poa (Sc1550002) 98 people | 34 ppb |
| Mccords Ferry at Lake Marion (Sc3850004) 21 people | 16 ppb |
| Gswsa - Myrtle Beach 25 people | 15 ppb |
| Mathews Heights (Sc2450021) 73 people | 15 ppb |
| 611 Harmon LLC (Sc4060012) 24 people | 15 ppb |
| Salley Town of (Sc0210005) 456 people | 15 ppb |
| Bethlehem-Roanoke W/D (Sc3920003) 6,334 people | 14 ppb |
| BGWC Riverbend Estates (Sc4660103) 93 people | 13 ppb |
| Mcdonalds MHP (Sc4060010) 16 people | 13 ppb |
Highest PFOA / PFOS
| Winnsboro Town of (2010001) 10,391 people | 32.8 ppt |
| Midcounty Water Dist 2 (Sc2020004) 3,500 people | 20.1 ppt |
| Draytonville Water Dist (Sc1120003) 5,456 people | 19.4 ppt |
| Grassy Pond Water Co INC (Sc1120002) 9,895 people | 19 ppt |
| Gaffney BPW (Sc1110001) 24,290 people | 18 ppt |
| Goucher WD (1120004) 5,426 people | 17 ppt |
| Grassy Pond Water Corporation 1,303 people | 16 ppt |
| Batesburg Leesville DPW (Sc3210002) 6,814 people | 15 ppt |
| Blacksburg Town of (Sc1110002) 3,963 people | 13 ppt |
| Grand Strand W&Sa/Bull Creek 252,840 people | 11.5 ppt |
Largest systems
| Greenville Water (Sc2310001) 426,057 people | 426,057 |
| Columbia City of (Sc4010001) 354,068 people | 354,068 |
| Charleston Water System (Sc1010001) 278,771 people | 278,771 |
| Grand Strand W&Sa/Bull Creek 252,840 people | 252,840 |
| Spartanburg Water System (Sc4210001) 166,364 people | 166,364 |
| BJW&Sa (Sc0720003) 164,829 people | 164,829 |
| Bcwsa Sangaree W/D (0820002) 95,345 people | 95,345 |
| Mt Pleasant Waterworks (Sc1010002) 91,500 people | 91,500 |
| Rock Hill City of (Sc4610002) 89,850 people | 89,850 |
| SJWD Middle Tyger WTP (Sc4220006) 89,531 people | 89,531 |
All ZIP codes in South Carolina
526 ZIP codes.
29001Alcolu29002Ballentine29003Bamberg29006Batesburg29009Bethune29010Bishopville29014Blackstock29015Blair29016Blythewood29018Bowman29020Camden29021Camden29030Cameron29031Carlisle29032Cassatt29033Cayce29036Chapin29037Chappells29038Cope29039Cordova29040Dalzell29041Davis Station29042Denmark29044Eastover29045Elgin29046Elliott29047Elloree29048Eutawville29051Gable29052Gadsden29053Gaston29054Gilbert29055Great Falls29056Greeleyville29058Heath Springs29059Holly Hill29061Hopkins29062Horatio29063Irmo29065Jenkinsville29067Kershaw29069Lamar29070Leesville29071Lexington29072Lexington29073Lexington29074Liberty Hill29075Little Mountain29078Lugoff29079Lydia29080Lynchburg29081Ehrhardt29082Lodge29101Mc Bee29102Manning29104Mayesville29105Monetta29107Neeses29108Newberry29111New Zion29112North29113Norway29114Olanta29115Orangeburg29116Orangeburg29118Orangeburg29122Peak29123Pelion29125Pinewood29126Pomaria29127Prosperity29128Rembert29129Ridge Spring29130Ridgeway29132Rion29133Rowesville29135Saint Matthews29137Salley29138Saluda29142Santee29143Sardinia29145Silverstreet29146Springfield29147State Park29148Summerton29150Sumter29151Sumter29152Shaw Afb29153Sumter29154Sumter29160Swansea29161Timmonsville29162Turbeville29163Vance29164Wagener29166Ward29168Wedgefield29169West Columbia29170West Columbia29171West Columbia29172West Columbia29175Westville29177White Rock29178Whitmire29180Winnsboro29201Columbia29202Columbia29203Columbia29204Columbia29205Columbia29206Columbia29207Columbia29208Columbia29209Columbia29210Columbia29211Columbia29212Columbia29214Columbia29215Columbia29216Columbia29217Columbia29218Columbia29219Columbia29220Columbia29221Columbia29222Columbia29223Columbia29224Columbia29225Columbia29226Columbia29227Columbia29228Columbia29229Columbia29230Columbia29240Columbia29250Columbia29260Columbia29290Columbia29292Columbia29301Spartanburg29302Spartanburg29303Spartanburg29304Spartanburg29305Spartanburg29306Spartanburg29307Spartanburg29316Boiling Springs29319Spartanburg29320Arcadia29321Buffalo29322Campobello29323Chesnee29324Clifton29325Clinton29329Converse29330Cowpens29331Cross Anchor29332Cross Hill29333Drayton29334Duncan29335Enoree29336Fairforest29338Fingerville29340Gaffney29341Gaffney29342Gaffney29348Gramling29349Inman29351Joanna29353Jonesville29355Kinards29356Landrum29360Laurens29364Lockhart29365Lyman29369Moore29370Mountville29372Pacolet29373Pacolet Mills29374Pauline29375Reidville29376Roebuck29377Startex29378Una29379Union29384Waterloo29385Wellford29386White Stone29388Woodruff29395Jonesville29401Charleston29402Charleston29403Charleston29404Charleston Afb29405North Charleston29406Charleston29407Charleston29410Hanahan29412Charleston29413Charleston29414Charleston29415North Charleston29416Charleston29417Charleston29418North Charleston29419North Charleston29420North Charleston29422Charleston29423Charleston29426Adams Run29429Awendaw29431Bonneau29432Branchville29433Canadys29434Cordesville29435Cottageville29436Cross29437Dorchester29438Edisto Island29439Folly Beach29440Georgetown29442Georgetown29445Goose Creek29446Green Pond29447Grover29448Harleyville29449Hollywood29450Huger29451Isle Of Palms29452Jacksonboro29453Jamestown29455Johns Island29456Ladson29457Johns Island29458Mc Clellanville29461Moncks Corner29464Mount Pleasant29465Mount Pleasant29466Mount Pleasant29468Pineville29469Pinopolis29470Ravenel29471Reevesville29472Ridgeville29474Round O29475Ruffin29476Russellville29477Saint George29479Saint Stephen29481Smoaks29482Sullivans Island29483Summerville29484Summerville29485Summerville29486Summerville29487Wadmalaw Island29488Walterboro29492Charleston29493Williams29501Florence29502Florence29503Florence29504Florence29505Florence29506Florence29510Andrews29511Aynor29512Bennettsville29516Blenheim29518Cades29519Centenary29520Cheraw29525Clio29526Conway29527Conway29528Conway29530Coward29532Darlington29536Dillon29540Darlington29541Effingham29543Fork29544Galivants Ferry29545Green Sea29546Gresham29547Hamer29550Hartsville29551Hartsville29554Hemingway29555Johnsonville29556Kingstree29560Lake City29563Lake View29564Lane29565Latta29566Little River29567Little Rock29568Longs29569Loris29570Mc Coll29571Marion29572Myrtle Beach29574Mullins29575Myrtle Beach29576Murrells Inlet29577Myrtle Beach29578Myrtle Beach29579Myrtle Beach29580Nesmith29581Nichols29582North Myrtle Beach29583Pamplico29584Patrick29585Pawleys Island29587Myrtle Beach29588Myrtle Beach29589Rains29590Salters29591Scranton29592Sellers29593Society Hill29594Tatum29596Wallace29597North Myrtle Beach29598North Myrtle Beach29601Greenville29602Greenville29603Greenville29604Greenville29605Greenville29606Greenville29607Greenville29608Greenville29609Greenville29610Greenville29611Greenville29612Greenville29613Greenville29614Greenville29615Greenville29616Greenville29617Greenville29620Abbeville29621Anderson29622Anderson29623Anderson29624Anderson29625Anderson29626Anderson29627Belton29628Calhoun Falls29630Central29631Clemson29632Clemson29633Clemson29634Clemson29635Cleveland29636Conestee29638Donalds29639Due West29640Easley29641Easley29642Easley29643Fair Play29644Fountain Inn29645Gray Court29646Greenwood29647Greenwood29648Greenwood29649Greenwood29650Greer29651Greer29652Greer29653Hodges29654Honea Path29655Iva29656La France29657Liberty29658Long Creek29659Lowndesville29661Marietta29662Mauldin29664Mountain Rest29665Newry29666Ninety Six29667Norris29669Pelzer29670Pendleton29671Pickens29672Seneca29673Piedmont29675Richland29676Salem29677Sandy Springs29678Seneca29679Seneca29680Simpsonville29681Simpsonville29682Six Mile29683Slater29684Starr29685Sunset29686Tamassee29687Taylors29689Townville29690Travelers Rest29691Walhalla29692Ware Shoals29693Westminster29695Hodges29696West Union29697Williamston29702Blacksburg29703Bowling Green29704Catawba29706Chester29707Fort Mill29708Fort Mill29709Chesterfield29710Clover29712Edgemoor29714Fort Lawn29715Fort Mill29716Fort Mill29717Hickory Grove29718Jefferson29720Lancaster29721Lancaster29722Lancaster29724Lando29726Mc Connells29727Mount Croghan29728Pageland29729Richburg29730Rock Hill29731Rock Hill29732Rock Hill29733Rock Hill29734Rock Hill29741Ruby29742Sharon29743Smyrna29744Van Wyck29745York29801Aiken29802Aiken29803Aiken29804Aiken29805Aiken29809New Ellenton29810Allendale29812Barnwell29813Hilda29816Bath29817Blackville29819Bradley29821Clarks Hill29822Clearwater29824Edgefield29826Elko29827Fairfax29828Gloverville29829Graniteville29831Jackson29832Johnston29834Langley29835Mc Cormick29836Martin29838Modoc29839Montmorenci29840Mount Carmel29841North Augusta29842Beech Island29843Olar29844Parksville29845Plum Branch29846Sycamore29847Trenton29848Troy29849Ulmer29850Vaucluse29851Warrenville29853Williston29856Windsor29860North Augusta29861North Augusta29899Mc Cormick29901Beaufort29902Beaufort29903Beaufort29904Beaufort29905Parris Island29906Beaufort29907Beaufort29909Okatie29910Bluffton29911Brunson29912Coosawhatchie29913Crocketville29914Dale29915Daufuskie Island29916Early Branch29918Estill29920Saint Helena Island29921Furman29922Garnett29923Gifford29924Hampton29925Hilton Head Island29926Hilton Head Island29927Hardeeville29928Hilton Head Island29929Islandton29931Lobeco29932Luray29933Miley29934Pineland29935Port Royal29936Ridgeland29938Hilton Head Island29939Scotia29940Seabrook29941Sheldon29943Tillman29944Varnville29945Yemassee
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions
How many water systems in South Carolina have violations?
108 of 555 active community water systems in South Carolina reported at least one health-based violation since 2016 (EPA SDWIS).
What is the radon risk in South Carolina?
33 ZIP codes are in EPA radon zone 1 (highest potential), 109 in zone 2 and 384 in zone 3. EPA recommends testing every home.