Tap Water Quality Report
Tap water quality in MARIETTA, Georgia
Tap water in MARIETTA, Georgia receives a grade of D (65/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily COBB COUNTY. 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.
What's in MARIETTA's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving MARIETTA.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 27.7 ppb, 461x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 41.7 ppb, 278x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 25.3 ppb, 253x above the EWG health guideline of 0.1 ppb.
Water systems serving MARIETTA
MARIETTA is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
COBB COUNTY
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
MARIETTA BOARD OF LIGHTS AND WATER
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
Recommended filters for MARIETTA
Filters matched to the specific contaminants in MARIETTA's water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in MARIETTA'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 |
33.3 ppb | 0.06 | — | — | — | — | — | 555× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
51.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 346× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
25.3 ppb | 0.1 | 60.0 | 60 | — | — | — | 253× over |
| Bromodichloromethane Disinfection byproduct |
8.2 ppb | 0.06 | — | — | — | — | — | 137× over |
| Chloroform Disinfection byproduct |
41.1 ppb | 0.4 | — | — | — | — | — | 103× over |
| Trichloroacetic acid Disinfection byproduct |
10.3 ppb | 0.1 | — | — | — | — | — | 103× over |
| Dichloroacetic acid Disinfection byproduct |
14.0 ppb | 0.2 | — | — | — | — | — | 70× over |
| Dibromochloromethane Disinfection byproduct |
3.58 ppb | 0.1 | — | — | — | — | — | 36× over |
| Chromium (hexavalent) Heavy metal |
0.085 ppb | 0.02 | — | — | — | — | — | 4.3× over |
| Nitrate and nitrite* Inorganic |
0.478 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.4× over |
| Dibromoacetic acid Disinfection byproduct |
0.0575 ppb | 0.03 | — | — | — | — | — | 1.9× over |
| Chlorate Disinfection byproduct |
283.5 ppb | 210.0 | — | — | — | — | — | 1.4× over |
| Manganese Heavy metal |
16.1 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.12 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Aluminum* Heavy metal |
8.67 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0046 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.0655 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
3.58 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
1.63 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.025 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.8 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0344 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride* Inorganic |
0.665 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.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from COBB COUNTY.