Perfluorooctanesulfonic acid
6.3ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: Three PFAS, HFPO-DA (GenX), PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); 1 more is detected with no federal limit, and everything else measured is within its reference or not detected. Cayce City of (Sc3210003) serves 17,460 residents.
EPA lists this system for the city. Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
Also supplies: Pine Ridge
Each bar is drawn in blocks of its own limit, so the length shows how far above it the result sits.
6.3ng/L
Each block = 4.0 ng/L federal MCL (2024)
5.5ng/L
Each block = 4.0 ng/L federal MCL (2024)
11.6ng/L
Each block = 10 ng/L federal MCL (2024)
CAYCE CITY OF (SC3210003) (EPA PWSID SC3210003) delivers surface water to 17,460 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
A tap test can confirm levels at your home before you choose treatment.
PFOS 6.3 ng/L, above the 4 ng/L limit (+5 more PFAS detected)
Each card names which Cayce findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Cayce, PFOS 6.3 ng/L (limit 4 ng/L), PFOA 5.5 ng/L (limit 4 ng/L) and HFPO-DA (GenX) 11.6 ng/L (limit 10 ng/L) were measured above their limits in EPA's 2024 testing. CAYCE CITY OF (SC3210003) (PWSID SC3210003) has a Purity Score of 66/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
CAYCE CITY OF (SC3210003) (PWS ID SC3210003) is the public water system on record for Cayce, South Carolina, serving about 17,460 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2025-02-24 to 2025-12-10), PFOS was measured at 6.3 ng/L against a 4 ng/L federal limit, PFOA was measured at 5.5 ng/L against a 4 ng/L federal limit and HFPO-DA (GenX) was measured at 11.6 ng/L against a 10 ng/L federal limit. PFBS (3.8 ng/L, below the 2,000 ng/L EPA health advisory) and PFHxA (4.9 ng/L, below the 400,000 ng/L state limit) were also detected. PFPeA (5 ng/L) was also detected; it has no federal or state limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
Lead is not in Cayce's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
PurityMap's current record for Cayce holds 31 findings: 3 above a reference, 2 detected within the reference, 1 detected with no limit and 25 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 6.3 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorooctanoic acid (PFOA) | 5.5 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | 11.6 ng/L | 10 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorobutanesulfonic acid (PFBS) | 3.8 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorohexanoic acid (PFHxA) | 4.9 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoropentanoic acid (PFPeA) | 5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2021–2023 monitoring period | Lead & Copper Rule 90th-percentile: CAYCE CITY OF (SC3210003) (SC3210003) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-12-10 | UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003) |
Perfluorooctanesulfonic acid (PFOS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
Perfluorobutanesulfonic acid (PFBS)
Perfluorohexanoic acid (PFHxA)
Perfluoropentanoic acid (PFPeA)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: CAYCE CITY OF (SC3210003) (SC3210003)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: CAYCE CITY OF (SC3210003) (SC3210003)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Cayce City of (Sc3210003) reported something related, it's shown below.
Lead at Cayce City of (Sc3210003): not detected (90th percentile, 2021–2023 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.