Perfluorooctanesulfonic acid
7.9ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: Two PFAS, 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. West Columbia City of (Sc3210004) serves 34,028 residents.
This report uses the largest, WEST COLUMBIA CITY OF (SC3210004). Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
Each bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.
7.9ng/L
Each block = 4.0 ng/L federal MCL (2024)
6.1ng/L
Each block = 4.0 ng/L federal MCL (2024)
WEST COLUMBIA CITY OF (SC3210004) (EPA PWSID SC3210004) delivers surface water to 34,028 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.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
PFOS 7.9 ng/L, above the 4 ng/L limit (+5 more PFAS detected)
lead 3 µg/L, below the 15 µg/L action level (detected below the limit); 151 galvanized lines to replace (context, not a tap measurement)
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
When your results arrive, read them here →
Each card names which West Columbia 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 West Columbia, PFOS 7.9 ng/L and PFOA 6.1 ng/L were measured above the 4 ng/L federal limit in EPA's 2024 testing; the lead 90th-percentile result was 3 µg/L against the 15 µg/L action level. WEST COLUMBIA CITY OF (SC3210004) (PWSID SC3210004) has a Purity Score of 54/100 (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.
WEST COLUMBIA CITY OF (SC3210004) (PWS ID SC3210004) is the public water system on record for West Columbia, South Carolina, serving about 34,028 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 (2024-12-10 to 2025-09-10), PFOS was measured at 7.9 ng/L against a 4 ng/L federal limit and PFOA was measured at 6.1 ng/L against a 4 ng/L federal limit. HFPO-DA (GenX) (9.7 ng/L, below the 10 ng/L federal limit), PFBS (4.1 ng/L, below the 2,000 ng/L EPA health advisory) and PFHxA (5.3 ng/L, below the 400,000 ng/L state limit) were also detected. PFPeA (5.9 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.
WEST COLUMBIA CITY OF (SC3210004)'s most recent lead 90th-percentile result (2023–2025) was 3 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
PurityMap's current record for West Columbia holds 31 findings: 2 above a reference, 4 detected within the reference, 1 detected with no limit and 24 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) | 7.9 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorooctanoic acid (PFOA) | 6.1 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | 9.7 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Lead (90th percentile) | 3 µg/L | 15 µg/L federal action level | Below the listed reference | 2023–2025 monitoring period | Lead & Copper Rule 90th-percentile: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorobutanesulfonic acid (PFBS) | 4.1 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 | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorohexanoic acid (PFHxA) | 5.3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoropentanoic acid (PFPeA) | 5.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| 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 | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| 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 | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| 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 | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| 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 | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| 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 | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| 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 | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-10 to 2025-09-10 | UCMR5 Analytical Results: WEST COLUMBIA CITY OF (SC3210004) (SC3210004) |
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: WEST COLUMBIA CITY OF (SC3210004) (SC3210004)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: WEST COLUMBIA CITY OF (SC3210004) (SC3210004)
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 West Columbia City of (Sc3210004) reported something related, it's shown below.
Lead at West Columbia City of (Sc3210004): 3 µg/L (90th percentile, 2023–2025 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.