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Community Water System · PWS TN0000899

Old Hickory Wat Co-Union County

Maynardville, Tennessee 37807 - drinking water served from surface water sources to 342 people, tracked in EPA SDWIS and UCMR5.

342
People served
370
EPA violations
239
Health-based
Untested
UCMR5 result

The verdict

EPA records 370 drinking-water violations at Old Hickory Wat Co-Union County, 65% of them health-based - above the Tennessee per-system average.

370
Total EPA violations on record
65%
Health-based (MCL / treatment failure)
342
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Old Hickory Wat Co-Union County

Old Hickory Wat Co-Union County is a private-owned community water system that delivers drinking water to 342 residents in Maynardville, Tennessee (Union County) through 131 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 370 total violations for this system , of which 239 (65%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 75 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 237 violations (TT, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Tennessee, EPA tracks 762 public water systems serving 7,934,203 people, with 43,318 cumulative violations and 9,414 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 56.8 violations. Statewide, 93 of 277 UCMR5-tested systems have reported PFAS detections (33.6%).

Old Hickory Wat Co-Union County's 370 violations sit above the Tennessee average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
342
Total Violations
370
Health-Based Violations
239
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
131
County
Union
School/Daycare
No
MCL Violations
2
Monitoring Violations
75
Treatment Tech Violations
237

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 237 2001
Coliform (TCR) MR 21 2011
TTHM MR 13 2020
Lead and Copper Rule MR 12 2020
Chlorine MR 11 2022
Total Haloacetic Acids (HAA5) MR 9 2020
Consumer Confidence Rule Other 8 2024
Revised Total Coliform Rule MON 8 2022
Coliform (TCR) MCL 2 1990
Nitrate MR 1 1996

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Old Hickory Wat Co-Union County.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID TN0000899 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Tennessee Drinking Water Authority

Tennessee Department of Environment & Conservation, Drinking Water is the primacy agency that licenses and inspects Old Hickory Wat Co-Union County under EPA-delegated authority.

Open TN regulator portal

Source: Tennessee Department of Environment & Conservation, Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Consumer Confidence Rule Other 8 SDWIS / TN0000899 / 7000
2022 Chlorine MR 11 SDWIS / TN0000899 / 0999
2022 Revised Total Coliform Rule MON 8 SDWIS / TN0000899 / 8000
2020 TTHM MR 13 SDWIS / TN0000899 / 2950
2020 Lead and Copper Rule MR 12 SDWIS / TN0000899 / 5000
2020 Total Haloacetic Acids (HAA5) MR 9 SDWIS / TN0000899 / 2456
2011 Coliform (TCR) MR 21 SDWIS / TN0000899 / 3100
2001 Surface Water Treatment Rule TT 237 SDWIS / TN0000899 / 0200
1996 Nitrate MR 1 SDWIS / TN0000899 / 1040
1990 Coliform (TCR) MCL 2 SDWIS / TN0000899 / 3100

How Old Hickory Wat Co-Union County Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Old Hickory Wat Co-Union County Tennessee avg Federal benchmark
Total violations 370 56.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 239 12.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 33.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 342 10,412 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 762 regulated public water systems in Tennessee.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Old Hickory Wat Co-Union County water safe to drink? ▼
Old Hickory Wat Co-Union County (PWS ID: TN0000899) has 370 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 342 people using Surface Water sources.
How many people does Old Hickory Wat Co-Union County serve? ▼
Old Hickory Wat Co-Union County serves 342 people in Maynardville, Tennessee. It is a Private-owned system using Surface Water water sources with 131 service connections.
What type of violations does Old Hickory Wat Co-Union County have? ▼
Old Hickory Wat Co-Union County has 370 total violations: 239 health-based violations (MCL exceedances or treatment failures), 75 monitoring/reporting violations, and 237 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Old Hickory Wat Co-Union County water? ▼
No PFAS testing data is available for Old Hickory Wat Co-Union County under the EPA's UCMR5 monitoring program.
What water source does Old Hickory Wat Co-Union County use? ▼
Old Hickory Wat Co-Union County uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.