Tap Water Quality Report
Tap water quality in LAUREL, Maryland
Tap water in LAUREL, Maryland receives a grade of C (73/100) from TapWaterSafety.org. It's served by WASHINGTON SUBURBAN SANITARY COMMISSION. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in LAUREL's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving LAUREL.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 50.5 ppb, 841x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 38.1 ppb, 381x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 54.0 ppb, 360x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for WASHINGTON SUBURBAN SANITARY COMMISSION (system ID MD0150005) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for LAUREL
Filters matched to the specific contaminants in LAUREL's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
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 LAUREL'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 |
50.5 ppb | 0.06 | — | — | — | — | — | 841× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
38.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 381× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
54.0 ppb | 0.15 | 80.0 | 100 | — | — | — | 360× over |
| Bromochloroacetic acid Disinfection byproduct |
4.83 ppb | 0.02 | — | — | — | — | — | 242× over |
| Bromodichloromethane Disinfection byproduct |
6.14 ppb | 0.06 | — | — | — | — | — | 102× over |
| Chloroform Disinfection byproduct |
13.5 ppb | 0.4 | — | — | — | — | — | 34× over |
| Dibromochloromethane Disinfection byproduct |
1.81 ppb | 0.1 | — | — | — | — | — | 18× over |
| Nitrate and nitrite Inorganic |
1.08 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 7.7× over |
| Nitrate Inorganic |
1.06 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 7.6× over |
| Chromium (hexavalent) Heavy metal |
0.111 ppb | 0.02 | — | — | — | — | — | 5.6× over |
| Radium, combined (-226 and -228) Radiological |
0.18 pCi/L | 0.05 | 5.0 | — | — | — | — | 3.7× over |
| Bromoform Disinfection byproduct |
0.55 ppb | 0.5 | — | — | — | — | — | 1.1× over |
| Manganese Heavy metal |
13.6 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Chlorate Disinfection byproduct |
11.2 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
29.6 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
0.197 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
2.51 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
2.11 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.104 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.683 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 WASHINGTON SUBURBAN SANITARY COMMISSION.