Drinking water quality · 2025
· Verified
What's in Grand Rapids, MI tap water
22 contaminants were measured in the Grand Rapids, MI water system's 2025 annual report. Each is shown below against its federal limit.
- Reporting year
- 2025
- Contaminants measured
- 22
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- MI
Where your water comes from · EPA SDWIS
Grand Rapids, MI's drinking water comes from surface water, drawn from 2 sources.
Source
- INTAKE 1
- INTAKE 2
Treatment
- TREATMENT PLANT
Distribution
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 70.7 ug/LMaximumSystem-wide | 80 ug/LMCL | Approaching the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 46.7 ug/LMaximumSystem-wide | 60 ug/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 7 ug/L90th percentileAt the tap | 12 ug/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected ug/LReported levelDetected In | 10 ug/LMCL | None detected |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | Not detected ug/LReported levelDetected In | None set | None detected |
| CopperA metal that enters water from corroding household plumbing. | 0 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected ug/LReported levelDetected In | 2 ug/LMCLG | None detected |
| SodiumA naturally occurring salt component. | 14 mg/LReported levelDetected In | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.51 mg/LMaximumSystem-wide | 4 mg/LMCLG | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.94 pCi/LReported levelDetected In | 5 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0.4 ug/LReported levelDetected In | 30 ug/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.65 mg/LReported levelDetected In | 4 mg/LMCLG | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.7 mg/LReported levelDetected In | 10 mg/LMCLG | Within the limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 2.4 ng/LMaximumSystem-wide | 16 ng/LMCL | Within the limit |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected ng/LReported levelDetected In | 370 ng/LMCL | None detected |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LReported levelDetected In | 420 ng/LMCL | None detected |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LReported levelDetected In | 51 ng/LMCL | None detected |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LReported levelDetected In | 400 ng/LMCL | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected ng/LReported levelDetected In | 6 ng/LMCL | None detected |
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | Not detected ng/LReported levelDetected In | 8 ng/LMCL | None detected |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cryptosporidium | Not detectedReported levelDetected In | None set | None detected |
| Giardia lamblia | Not detectedReported levelDetected In | None set | None detected |
People also ask about Grand Rapids, MI's water
+Is Grand Rapids, MI tap water safe to drink in 2025?
Every one of the 22 contaminants measured in Grand Rapids, MI's 2025 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 Grand Rapids, MI tap water?
22 contaminants were measured in Grand Rapids, MI's 2025 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and disinfection byproducts. 18 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Grand Rapids, MI tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: TTHM. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Grand Rapids, MI's 2025 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 Grand Rapids, MI'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 2025 report; a new report will replace it once the utility publishes its next annual update.