Perfluorooctanesulfonic acid
6.8ng/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); lithium sits above a screening level, and a past health-based violation (Chlorite) is on record. Sharyland WSC serves 68,562 residents.
Your water bill or annual water quality report names your actual supplier.
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.
6.8ng/L
Each block = 4.0 ng/L federal MCL (2024)
4.3ng/L
Each block = 4.0 ng/L federal MCL (2024)
SHARYLAND WSC (EPA PWSID TX1080033) delivers surface water to 68,562 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.
1health-based violation in the last 10 years
From EPA SDWIS. Counted once per contaminant per year, as in the Track record score.
Every filing is listed; the Track record score counts at most one per contaminant per year.
Resolved
to Resolved
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
PFOS 6.8 ng/L, above the 4 ng/L limit (+7 more PFAS detected)
lead 1 µg/L, below the 15 µg/L action level
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 Alton 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 Alton, PFOS 6.8 ng/L and PFOA 4.3 ng/L were measured above the 4 ng/L federal limit in EPA's 2024 testing; the lead 90th-percentile result was 1 µg/L against the 15 µg/L action level; one health-based violation is on record (Chlorite). SHARYLAND WSC (PWSID TX1080033) has a Purity Score of 61/100 (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.
SHARYLAND WSC (PWS ID TX1080033) is the public water system on record for Alton, Texas, serving about 68,562 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 (2024-07-23 to 2025-04-23), PFOS was measured at 6.8 ng/L against a 4 ng/L federal limit and PFOA was measured at 4.3 ng/L against a 4 ng/L federal limit. PFBS (3 ng/L, below the 2,000 ng/L EPA health advisory), PFHxA (12.5 ng/L, below the 400,000 ng/L state limit) and PFHxS (6.4 ng/L, below the 10 ng/L federal limit) were also detected. PFBA (11.7 ng/L), PFHpA (4.5 ng/L) and PFPeA (12.3 ng/L) were also detected; they have no federal or state limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
SHARYLAND WSC's most recent lead 90th-percentile result (2024) was 1 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.
The federal SDWIS record lists a health-based violation for SHARYLAND WSC within about the last ten years: Chlorite (2019). The findings above show each one's status.
PurityMap's current record for Alton holds 32 findings: 4 above a reference, 4 detected within the reference, 3 detected with no limit and 21 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 |
|---|---|---|---|---|---|
| Lithium | 41.3 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorooctanesulfonic acid (PFOS) | 6.8 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Chlorite | 1.4 MG/L | 1.0 mg/L | Above the listed reference | 2019 | EPA SDWIS Violations & Enforcement: SHARYLAND WSC (TX1080033) |
| Perfluorooctanoic acid (PFOA) | 4.3 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorohexanesulfonic acid (PFHxS) | 6.4 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Lead (90th percentile) | 1 µg/L | 15 µg/L federal action level | Below the listed reference | 2024–2024 monitoring period | Lead & Copper Rule 90th-percentile: SHARYLAND WSC (TX1080033) |
| Perfluorobutanesulfonic acid (PFBS) | 3 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 | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorohexanoic acid (PFHxA) | 12.5 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorobutanoic acid (PFBA) | 11.7 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoroheptanoic acid (PFHpA) | 4.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoropentanoic acid (PFPeA) | 12.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| 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 | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| 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 | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| 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 | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| 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 | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| 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 | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-10-06 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-10-06 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-10-06 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-10-06 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-23 to 2025-04-23 | UCMR5 Analytical Results: SHARYLAND WSC (TX1080033) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorobutanesulfonic acid (PFBS)
Perfluorohexanoic acid (PFHxA)
Perfluoroheptanoic acid (PFHpA)
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)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
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)
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: SHARYLAND WSC (TX1080033)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: SHARYLAND WSC (TX1080033)
US EPA SDWIS
State SDWIS Compliance Record
EPA SDWIS Violations & Enforcement: SHARYLAND WSC (TX1080033)
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 Sharyland WSC reported something related, it's shown below.
Lead at Sharyland WSC: 1 µg/L (90th percentile, 2024 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.