Water report · not indexed
What is in the water at 37016
3 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
DEKALB UTILITY DISTRICT #1
PWSID TN0000188 · TN · serves 17,511 people
PFAS and lithium
Sampled, nothing detected. Tested for 30 compounds under UCMR 5 with none found at or above its reporting limit. A reporting limit is the lowest concentration the method can measure, so this means “below that” rather than “zero”.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Median hardness 110 mg/L as CaCO₃, measured at 6 stations serving this system across 52 results, 2015-01-15 to 2020-10-07. Measured in the water source and distribution area, not at a tap, and not in your home.
DEKALB UTILITY DISTRICT #4
PWSID TN0000835 · TN · serves 848 people
PFAS and lithium
Not sampled for PFAS. EPA’s UCMR 5 monitoring covered every system serving more than 3,300 people and only a sample of smaller ones. This system was not in it, so there is no result to show, which is not the same as a result showing nothing.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Median hardness 82 mg/L as CaCO₃, measured at 11 stations serving this system across 105 results, 2015-01-15 to 2020-10-07. Measured in the water source and distribution area, not at a tap, and not in your home.
WILSON CO WATER & WASTEWATER
PWSID TN0000790 · TN · serves 22,680 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 11 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFHxA | 0.017 µg/L | 4 | 9/23/2025 |
| PFBS | 0.017 µg/L | 2 | 9/23/2025 |
| PFPeA | 0.0094 µg/L | 3 | 9/23/2025 |
| PFBA | 0.0086 µg/L | 1 | 9/23/2025 |
| PFOA | 0.0065 µg/L | 1 | 9/23/2025 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Median hardness 87 mg/L as CaCO₃, measured at 3 stations serving this system across 18 results, 2015-01-22 to 2018-10-17. Measured in the water source and distribution area, not at a tap, and not in your home.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01.