Tap Water Quality Report
Tap water quality in CLEMMONS, North Carolina
Tap water in CLEMMONS, North Carolina receives a grade of F (48/100) from TapWaterSafety.org. It's served by WINSTON-SALEM, CITY OF. The most significant water quality concerns are: PFAS contamination; 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 CLEMMONS's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving CLEMMONS.
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 31.2 ppb, 521x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 47.2 ppb, 315x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 30.0 ppb, 300x above the EWG health guideline of 0.1 ppb.
Recommended filters for CLEMMONS
Filters matched to the specific contaminants in CLEMMONS's water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
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 CLEMMONS'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 |
31.2 ppb | 0.06 | — | — | — | — | — | 521× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
47.2 ppb | 0.15 | 80.0 | 100 | — | — | — | 315× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
30.0 ppb | 0.1 | 60.0 | 60 | — | — | — | 300× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.247 ppt | 0.001 | 10.0 | — | — | — | — | 247× over |
| Perfluorodecanoic acid (PFDA) PFAS |
1.12 ppt | 0.006 | — | — | — | — | — | 187× over |
| Trichloroacetic acid Disinfection byproduct |
11.9 ppb | 0.1 | — | — | — | — | — | 119× over |
| Bromodichloromethane Disinfection byproduct |
6.94 ppb | 0.06 | — | — | — | — | — | 116× over |
| Chloroform Disinfection byproduct |
39.9 ppb | 0.4 | — | — | — | — | — | 100× over |
| Dichloroacetic acid Disinfection byproduct |
17.6 ppb | 0.2 | — | — | — | — | — | 88× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.173 ppt | 0.006 | 10.0 | — | — | — | — | 29× over |
| Perfluoroundecanoic acid (PFUnA) PFAS |
0.167 ppt | 0.006 | — | — | — | — | — | 28× over |
| Perfluorododecanoic acid (PFDoA) PFAS |
0.447 ppt | 0.06 | — | — | — | — | — | 7.5× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.578 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 6.4× over |
| Dibromochloromethane Disinfection byproduct |
0.39 ppb | 0.1 | — | — | — | — | — | 3.9× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.923 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 3.1× over |
| Chromium (hexavalent) Heavy metal |
0.0523 ppb | 0.02 | — | — | — | — | — | 2.6× over |
| Chlorate Disinfection byproduct |
129.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Perfluoropentane sulfonic acid (PFPeS) PFAS |
0.067 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.432 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.556 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.195 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
1.16 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.993 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.587 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.4 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0443 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.766 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 WINSTON-SALEM, CITY OF.