This page summarizes EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5, 2023–2025) drinking-water monitoring records linked to ZIP codes in South Carolina, as processed for the PFAS Estimator national dataset. Data updated: July 2026.
| Compound | Applicable threshold | ZIP codes detected | At/above threshold | Mean detected | Maximum detected |
|---|---|---|---|---|---|
| PFOA | 0.004 µg/L (MCL) | 161 (69.4% of state) | 161 (100.0%) — all detections at/above limit by construction | 0.0066 µg/L | 0.018 µg/L |
| PFOS | 0.004 µg/L (MCL) | 168 (72.4% of state) | 168 (100.0%) — all detections at/above limit by construction | 0.0084 µg/L | 0.0328 µg/L |
| PFHxS | 0.01 µg/L (MCL) | 25 (10.8% of state) | 1 (4.0% of detected) | 0.005 µg/L | 0.019 µg/L |
| HFPO-DA | 0.01 µg/L (MCL) | 79 (34.1% of state) | 33 (41.8% of detected) | 0.0347 µg/L | 0.14 µg/L |
| PFBS | 2.0 µg/L (HI reference) | 170 (73.3% of state) | not calculated¹ | 0.0053 µg/L | 0.0156 µg/L |
| Lithium | 7.36 µg/L (reference, not a regulatory limit) | 54 (23.3% of state) | 54 (100.0%) at/above reference | 22.0996 µg/L | 49.4 µg/L |
| PFPeA | — (no federal limit) | 179 (77.2% of state) | — | 0.0078 µg/L | 0.0399 µg/L |
| PFBA | — (no federal limit) | 59 (25.4% of state) | — | 0.0073 µg/L | 0.0097 µg/L |
| PFHpA | — (no federal limit) | 79 (34.1% of state) | — | 0.0037 µg/L | 0.0065 µg/L |
232 ZIP codes with at least one recorded PFAS detection. Click a ZIP code to view its full compound-level results.
| ZIP code | Compounds detected | At/above threshold |
|---|---|---|
| 29003 | 1 | No |
| 29006 | 5 | Yes (2) |
| 29016 | 7 | Yes (2) |
| 29018 | 3 | Yes (1) |
| 29020 | 3 | Yes (2) |
| 29030 | 3 | Yes (1) |
| 29033 | 5 | Yes (2) |
| 29036 | 6 | Yes (2) |
| 29038 | 3 | Yes (1) |
| 29039 | 3 | Yes (1) |
| 29040 | 1 | No |
| 29044 | 6 | Yes (2) |
| 29045 | 6 | Yes (2) |
| 29053 | 4 | Yes (3) |
| 29054 | 1 | No |
| 29055 | 3 | Yes (2) |
| 29056 | 1 | No |
| 29058 | 1 | No |
| 29061 | 6 | Yes (2) |
| 29063 | 6 | Yes (2) |
| 29067 | 1 | No |
| 29070 | 6 | Yes (2) |
| 29072 | 6 | Yes (3) |
| 29073 | 5 | Yes (3) |
| 29075 | 4 | Yes (2) |
| 29078 | 4 | Yes (2) |
| 29107 | 3 | Yes (1) |
| 29108 | 6 | Yes (3) |
| 29113 | 3 | Yes (1) |
| 29115 | 3 | Yes (1) |
| 29116 | 3 | Yes (1) |
| 29118 | 3 | Yes (1) |
| 29123 | 4 | Yes (3) |
| 29126 | 4 | Yes (2) |
| 29127 | 5 | Yes (2) |
| 29128 | 1 | No |
| 29129 | 5 | Yes (2) |
| 29130 | 5 | Yes (2) |
| 29133 | 3 | Yes (1) |
| 29138 | 6 | Yes (3) |
| 29145 | 6 | Yes (3) |
| 29150 | 1 | No |
| 29152 | 3 | Yes (3) |
| 29153 | 1 | No |
| 29154 | 1 | No |
| 29161 | 5 | Yes (2) |
| 29166 | 5 | Yes (2) |
| 29169 | 5 | Yes (2) |
| 29170 | 5 | Yes (3) |
| 29171 | 5 | Yes (2) |
| 29172 | 5 | Yes (2) |
| 29180 | 4 | Yes (2) |
| 29201 | 6 | Yes (2) |
| 29203 | 6 | Yes (2) |
| 29204 | 6 | Yes (2) |
| 29205 | 6 | Yes (2) |
| 29206 | 6 | Yes (2) |
| 29207 | 6 | Yes (2) |
| 29209 | 6 | Yes (2) |
| 29210 | 6 | Yes (2) |
| 29212 | 6 | Yes (2) |
| 29223 | 6 | Yes (2) |
| 29229 | 6 | Yes (2) |
| 29323 | 2 | Yes (2) |
| 29325 | 8 | Yes (3) |
| 29330 | 6 | Yes (2) |
| 29332 | 8 | Yes (3) |
| 29335 | 8 | Yes (3) |
| 29340 | 7 | Yes (2) |
| 29341 | 6 | Yes (2) |
| 29342 | 6 | Yes (2) |
| 29351 | 8 | Yes (3) |
| 29355 | 8 | Yes (3) |
| 29360 | 8 | Yes (3) |
| 29369 | 3 | Yes (1) |
| 29370 | 8 | Yes (3) |
| 29374 | 3 | Yes (1) |
| 29376 | 3 | Yes (1) |
| 29379 | 5 | Yes (2) |
| 29384 | 8 | Yes (3) |
| 29388 | 3 | Yes (1) |
| 29401 | 4 | Yes (2) |
| 29403 | 4 | Yes (2) |
| 29404 | 4 | Yes (2) |
| 29405 | 4 | Yes (2) |
| 29406 | 4 | Yes (2) |
| 29407 | 4 | Yes (2) |
| 29409 | 4 | Yes (2) |
| 29410 | 4 | Yes (2) |
| 29412 | 4 | Yes (2) |
| 29414 | 4 | Yes (2) |
| 29418 | 4 | Yes (2) |
| 29420 | 4 | Yes (2) |
| 29424 | 4 | Yes (2) |
| 29425 | 4 | Yes (2) |
| 29426 | 4 | Yes (2) |
| 29429 | 5 | Yes (2) |
| 29431 | 6 | Yes (2) |
| 29434 | 6 | Yes (2) |
| 29436 | 4 | Yes (2) |
| 29439 | 6 | Yes (2) |
| 29440 | 6 | Yes (2) |
| 29442 | 6 | Yes (2) |
| 29445 | 4 | Yes (2) |
| 29449 | 4 | Yes (2) |
| 29450 | 6 | Yes (2) |
| 29451 | 7 | Yes (2) |
| 29453 | 6 | Yes (2) |
| 29455 | 5 | Yes (2) |
| 29456 | 6 | Yes (2) |
| 29457 | 4 | Yes (2) |
| 29461 | 6 | Yes (2) |
| 29464 | 5 | Yes (2) |
| 29465 | 5 | Yes (2) |
| 29466 | 5 | Yes (2) |
| 29468 | 6 | Yes (2) |
| 29469 | 4 | Yes (2) |
| 29470 | 4 | Yes (2) |
| 29479 | 7 | Yes (2) |
| 29482 | 4 | Yes (2) |
| 29483 | 8 | Yes (2) |
| 29484 | 5 | Yes (2) |
| 29485 | 8 | Yes (2) |
| 29486 | 4 | Yes (2) |
| 29487 | 4 | Yes (2) |
| 29492 | 4 | Yes (2) |
| 29501 | 5 | Yes (2) |
| 29505 | 5 | Yes (2) |
| 29506 | 5 | Yes (2) |
| 29510 | 1 | No |
| 29511 | 7 | Yes (2) |
| 29518 | 1 | No |
| 29519 | 1 | No |
| 29520 | 3 | Yes (1) |
| 29526 | 7 | Yes (2) |
| 29527 | 7 | Yes (2) |
| 29532 | 1 | No |
| 29541 | 5 | Yes (2) |
| 29543 | 1 | No |
| 29544 | 7 | Yes (2) |
| 29545 | 7 | Yes (2) |
| 29546 | 1 | No |
| 29554 | 1 | No |
| 29555 | 1 | No |
| 29556 | 1 | No |
| 29560 | 1 | No |
| 29564 | 1 | No |
| 29565 | 1 | No |
| 29568 | 7 | Yes (2) |
| 29569 | 7 | Yes (2) |
| 29571 | 1 | No |
| 29572 | 5 | Yes (2) |
| 29574 | 1 | No |
| 29575 | 7 | Yes (2) |
| 29576 | 7 | Yes (2) |
| 29577 | 7 | Yes (2) |
| 29579 | 7 | Yes (2) |
| 29580 | 1 | No |
| 29581 | 7 | Yes (2) |
| 29582 | 6 | Yes (2) |
| 29585 | 6 | Yes (2) |
| 29588 | 7 | Yes (2) |
| 29589 | 1 | No |
| 29590 | 1 | No |
| 29592 | 1 | No |
| 29611 | 1 | No |
| 29620 | 3 | Yes (1) |
| 29621 | 1 | No |
| 29623 | 1 | No |
| 29624 | 3 | Yes (2) |
| 29625 | 1 | No |
| 29626 | 3 | Yes (2) |
| 29627 | 3 | Yes (1) |
| 29628 | 3 | Yes (1) |
| 29631 | 1 | No |
| 29634 | 1 | No |
| 29638 | 3 | Yes (1) |
| 29640 | 1 | No |
| 29642 | 1 | No |
| 29644 | 8 | Yes (3) |
| 29645 | 8 | Yes (3) |
| 29646 | 5 | Yes (3) |
| 29648 | 5 | Yes (3) |
| 29649 | 5 | Yes (3) |
| 29653 | 5 | Yes (3) |
| 29654 | 8 | Yes (3) |
| 29655 | 3 | Yes (2) |
| 29657 | 1 | No |
| 29659 | 3 | Yes (2) |
| 29666 | 5 | Yes (3) |
| 29669 | 8 | Yes (3) |
| 29670 | 1 | No |
| 29673 | 1 | No |
| 29680 | 8 | Yes (3) |
| 29681 | 8 | Yes (3) |
| 29684 | 3 | Yes (2) |
| 29692 | 8 | Yes (3) |
| 29695 | 5 | Yes (3) |
| 29697 | 1 | No |
| 29702 | 7 | Yes (2) |
| 29706 | 3 | Yes (2) |
| 29707 | 5 | Yes (1) |
| 29708 | 1 | No |
| 29714 | 3 | Yes (2) |
| 29715 | 1 | No |
| 29720 | 3 | Yes (1) |
| 29729 | 3 | Yes (2) |
| 29730 | 1 | No |
| 29731 | 1 | No |
| 29732 | 1 | No |
| 29744 | 1 | No |
| 29745 | 1 | No |
| 29816 | 3 | Yes (1) |
| 29821 | 4 | Yes (1) |
| 29822 | 3 | Yes (1) |
| 29824 | 4 | Yes (1) |
| 29829 | 3 | Yes (1) |
| 29835 | 4 | Yes (1) |
| 29838 | 4 | Yes (1) |
| 29840 | 4 | Yes (1) |
| 29841 | 3 | Yes (1) |
| 29842 | 3 | Yes (1) |
| 29844 | 4 | Yes (1) |
| 29845 | 4 | Yes (1) |
| 29847 | 3 | Yes (1) |
| 29848 | 4 | Yes (1) |
| 29860 | 3 | Yes (1) |
| 29861 | 3 | Yes (1) |
| 29909 | 4 | Yes (2) |
| 29920 | 5 | Yes (2) |
| 29926 | 5 | Yes (2) |
| 29928 | 5 | Yes (2) |
Results are based on EPA UCMR 5 monitoring data (2023–2025), linked to ZIP codes via Public Water System Identifier. Non-detections are not present in this analytic dataset. For each compound and ZIP code, the highest observed concentration across the monitoring period is retained; this characterizes the upper bound of observed drinking-water concentrations, not a long-term average or an individual exposure estimate. A single water system may serve multiple ZIP codes, so the same monitoring record can appear for more than one ZIP in this table. ZIP-code assignment reflects water-system service area geography and does not establish individual household exposure. Private wells are not represented unless served by a monitored public water system. PFOA and PFOS are reported by detection prevalence because the UCMR 5 reporting limit equals their federal MCL. A full PFBS Hazard Index is not calculated because co-located, same-event multi-compound readings are not retained in this dataset. Lithium has no federal Maximum Contaminant Level; 7.36 µg/L is an evidence-based reference concentration from a prospective cohort study, not a regulatory threshold.
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