Total trihalomethanes (TTHM) above the legal limit in the period starting January 2026.
Serves about 6,117 people (2,138 connections) with surface water bought from Webster Co Water District and Morganfield Water Works.
From EPA's record for KY1130433. PurityMap is independent of Union County Water District.
Are you this utility? Correct this listing →
26 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2026 | Total trihalomethanes (TTHM) | 0.092 mg/L | 0.080 mg/L | Archived |
| Jan–Mar 2026 | Haloacetic acids (HAA5) | 0.071 mg/L | 0.060 mg/L | Archived |
| Oct–Dec 2025 | Total trihalomethanes (TTHM) | 0.099 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2025 | Haloacetic acids (HAA5) | 0.075 mg/L | 0.060 mg/L | Archived |
| Jul–Sep 2025 | Total trihalomethanes (TTHM) | 0.104 mg/L | 0.080 mg/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jul–Sep 2025 | Haloacetic acids (HAA5) | 0.083 mg/L | 0.060 mg/L | Archived |
| Apr–Jun 2025 | Total trihalomethanes (TTHM) | 0.099 mg/L | 0.080 mg/L | Archived |
| Jan–Mar 2025 | Total trihalomethanes (TTHM) | 0.086 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2024 | Total trihalomethanes (TTHM) | 0.087 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2024 | Total trihalomethanes (TTHM) | 0.087 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2024 | Total trihalomethanes (TTHM) | 0.09 mg/L | 0.080 mg/L | Archived |
| Jan–Mar 2024 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2023 | Total trihalomethanes (TTHM) | 0.091 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2023 | Total trihalomethanes (TTHM) | 0.094 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2023 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2022 | Haloacetic acids (HAA5) | 0.062 mg/L | 0.060 mg/L | Resolved |
| Jan–Mar 2022 | Haloacetic acids (HAA5) | 0.064 mg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2021 | Haloacetic acids (HAA5) | 0.066 mg/L | 0.060 mg/L | Resolved |
| Apr–Jun 2020 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2019 | Haloacetic acids (HAA5) | 0.068 mg/L | 0.060 mg/L | Resolved |
| Apr–Jun 2019 | Haloacetic acids (HAA5) | 0.067 mg/L | 0.060 mg/L | Resolved |
| Jan–Mar 2019 | Haloacetic acids (HAA5) | 0.069 mg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2018 | Haloacetic acids (HAA5) | 0.071 mg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2018 | Haloacetic acids (HAA5) | 0.061 mg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2017 | Total trihalomethanes (TTHM) | 0.086 mg/L | 0.080 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2025 to September 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) | 8.6 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorobutanesulfonic acid (PFBS) | 7.7 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 | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoropentanoic acid (PFPeA) | 6.2 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| 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 | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| 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 | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| 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 | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| 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 | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| 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 | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| 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 | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-05 to 2025-09-09 | UCMR5 Analytical Results: UNION COUNTY WATER DISTRICT (KY1130433) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
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
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
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.
Get PurityMap updates about this water system.
Follow this water →Union County Water District's phone number on EPA record is 270-389-3868. Its mailing address is PO BOX 146, MORGANFIELD, KY 42437.
According to EPA's record, Union County Water District uses surface water bought from Webster Co Water District and Morganfield Water Works.
EPA's record shows 26 health-based violations for Union County Water District in the 10 years to July 9, 2026. Total trihalomethanes (TTHM) were above the legal limit in the period starting January 2026. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Union County Water District's latest lead and copper round, which ended in December 2023, was 5 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Union County Water District. Its phone number on EPA record is 270-389-3868. Its mailing address on EPA record is PO BOX 146, MORGANFIELD, KY 42437. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.