Drinking water quality · 2024
· Verified
What's in Marlborough, MA tap water
9 contaminants were measured in the Marlborough, MA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 9
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- MA
Where your water comes from · EPA SDWIS
Marlborough, MA buys its drinking water from MWRA.
Source
Treatment
- CEDAR HILL PUMP STATION (MWRA)
Distribution
Also buys water from MWRA.
Historical readings · EPA Six-Year Review (2012–2019)
1 contaminant historically over EPA limits in Marlborough, MA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
TTHM worst: 2012 | 0.084 mg/L 1.1× | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2013 | 0.031 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
FLUORIDE worst: 2012 | 1 mg/L within | 4 mg/L | '12'13'14'15'16 |
NITRATE worst: 2015 | 0.4 mg/L within | 10 mg/L | '12'13'14'15'16 |
BARIUM worst: 2016 | 0.039 mg/L within below national p90 | 2 mg/L | '12'13'14'15'16 |
COPPER worst: 2016 | 0.19 mg/L below national p90 | — | '16 |
DCAA worst: 2018 | 0.014 mg/L | — | '18'19 |
LEAD worst: 2016 | 0.54 mg/L | — | '16 |
MBAA worst: 2018 | 0.00092 mg/L | — | '18 |
MCAA worst: 2018 | 0.0041 mg/L | — | '18'19 |
TCAA worst: 2018 | 0.0017 mg/L | — | '18'19 |
BROMODICHLOROMETHANE worst: 2018 | 0.0031 mg/L | — | '18'19 |
CHLOROFORM worst: 2018 | 0.01 mg/L | — | '18'19 |
DIBROMOCHLOROMETHANE worst: 2018 | 0.00094 mg/L | — | '18'19 |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 1.94 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.82 pCi/LAverageSystem-wide | 5 pCi/LMCL | Within the limit |
People also ask about Marlborough, MA's water
+Is Marlborough, MA tap water safe to drink in 2024?
Every one of the 9 contaminants measured in Marlborough, MA's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Marlborough, MA tap water?
9 contaminants were measured in Marlborough, MA's 2024 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 9 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Marlborough, MA's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Marlborough, MA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.