What contaminants are in JOHNSON CITY tap water?

Public data sources identify the following contaminants in JOHNSON CITY's water supply: Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Trichloroacetic acid, Bromodichloromethane, Chloroform, Dichloroacetic acid, Chromium (hexavalent), Nitrate, Dibromochloromethane, Chlorate, Barium, Manganese, Monobromoacetic acid, Monochloroacetic acid, Vanadium, Strontium, Fluoride. Levels and comparison to EWG health guidelines are listed on the full city page.

Which water utility serves JOHNSON CITY?

JOHNSON CITY is served by JOHNSON CITY WATER DEPT. JOHNSON CITY WATER DEPT serves approximately 105,057 residents.

Tap Water Quality Report

Tap water quality in JOHNSON CITY, Tennessee

Q: Is the tap water in JOHNSON CITY, Tennessee safe to drink?

JOHNSON CITY's tap water receives a grade of C (78/100) from TapWaterSafety.org. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline, Total trihalomethanes (TTHMs) significantly above health guideline, Haloacetic acids (HAA5) significantly above health guideline. Grades are based on EPA SDWIS, EPA ECHO, EWG Tap Water Database, and the utility's published Consumer Confidence Report.

Served by JOHNSON CITY WATER DEPT. 105,057 residents.

Average score 78/100

Utilities 1

Population 105,057

78/100

Average

ⓘ How did we get this rating?

Quick answer

Tap water in JOHNSON CITY, Tennessee receives a grade of C (78/100) from TapWaterSafety.org. It's served by JOHNSON CITY WATER DEPT. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.

Data sources for this grade: utilities.csv EWG Tap Water Database ⓘ How did we get this rating?

What's in JOHNSON CITY's tap water

Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving JOHNSON CITY.

Haloacetic acids (HAA9) significantly above health guideline

Moderate concern

Haloacetic acids (HAA9) detected at 16.5 ppb, 275x above the EWG health guideline of 0.06 ppb.

Total trihalomethanes (TTHMs) significantly above health guideline

Moderate concern

Total trihalomethanes (TTHMs) detected at 26.5 ppb, 177x above the EWG health guideline of 0.15 ppb.

Haloacetic acids (HAA5) significantly above health guideline

Moderate concern

Haloacetic acids (HAA5) detected at 15.6 ppb, 156x above the EWG health guideline of 0.1 ppb.

EPA compliance record

Official U.S. EPA records for JOHNSON CITY WATER DEPT (system ID TN0000331) for the last 3 years. Checked 2026-10-07.

No health-based violations. EPA recorded 12 quarters with a testing, reporting or notice violation.

12 of 12quarters with a violation

Nolead above EPA action level

01/08/2025last state inspection

Rule	Type	Since	Status
Public Notice Rule and Revised PN Rule	Other (e.g. public notice)	02/04/2023	Open

Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.

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Filters matched to the specific contaminants in JOHNSON CITY's water supply.

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All contaminants detected in JOHNSON CITY's tap water

Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →

Contaminant	Detected	EWG US health-based	EPA US legal	EU DWD Europe	WHO global	CA PHG strictest US	Tested sample year	Status
Haloacetic acids (HAA9) Disinfection byproduct	16.5 ppb	0.06	—	—	—	—	—	275× over
Total trihalomethanes (TTHMs) Disinfection byproduct	26.5 ppb	0.15	80.0	100	—	—	—	177× over
Haloacetic acids (HAA5) Disinfection byproduct	15.6 ppb	0.1	60.0	60	—	—	—	156× over
Trichloroacetic acid Disinfection byproduct	8.11 ppb	0.1	—	—	—	—	—	81× over
Bromodichloromethane Disinfection byproduct	3.81 ppb	0.06	—	—	—	—	—	64× over
Chloroform Disinfection byproduct	20.9 ppb	0.4	—	—	—	—	—	52× over
Dichloroacetic acid Disinfection byproduct	6.22 ppb	0.2	—	—	—	—	—	31× over
Chromium (hexavalent) Heavy metal	0.0917 ppb	0.02	—	—	—	—	—	4.6× over
Nitrate Inorganic	0.341 ppm	0.14	10.0	11.3	11.3	10	—	2.4× over
Dibromochloromethane Disinfection byproduct	0.126 ppb	0.1	—	—	—	—	—	1.3× over
Chlorate Disinfection byproduct	96.8 ppb	210.0	—	—	—	—	—	Below guideline
Barium Heavy metal	35.9 ppb	700.0	2000.0	—	1300	2000	—	Below guideline
Manganese Heavy metal	3.62 ppb	100.0	—	50	80	—	—	Below guideline
Monobromoacetic acid Disinfection byproduct	0.594 ppb	25.0	—	—	—	—	—	Below guideline
Monochloroacetic acid Disinfection byproduct	0.512 ppb	53.0	—	—	—	—	—	Below guideline
Vanadium Other	0.0134 ppb	21.0	—	—	—	—	—	Below guideline
Strontium Radiological	0.0587 ppb	1500.0	—	—	—	—	—	Below guideline
Fluoride Inorganic	0.662 ppm	—	4.0	1.5	1.5	—	—	Below guideline

All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.

Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.