Drinking water quality · 2024
· Verified
· PWSID WI4050468
What's in Green Bay, WI tap water
Every one of the 13 core regulated contaminants reported for Green Bay, WI came in below its federal limit.
- !1 contaminant within 20% of a limit
- !13 of 27 core regulated contaminants reported — 14 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −0 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −4 health-based violations resolved in the last 5 years
- −9 core regulated contaminants never reported (13/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Bromate88% of the federal limit0–8.8 ug/L · limit 10 ug/L
Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.
higher than 90% of U.S. systems
+30 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 15.3–47.3 ug/L | 80 ug/L |
| PFOS | 2.2 ng/L | 4 ng/L |
| PFOA | 2 ng/L | 4 ng/L |
| Copper | 0.5 mg/L | 1.3 mg/L |
| Fluoride | 0.75–0.82 mg/L | 4 mg/L |
| Lead | 2.5 ug/L | 15 ug/L |
| HAA5 | 6.1–7.5 ug/L | 60 ug/L |
| Arsenic | 1.1 ug/L | 10 ug/L |
| Combined Radium | 0.4 pCi/L | 5 pCi/L |
| Perfluorohexanesulfonic acid | 0.73 ng/L | 10 ng/L |
| Perfluorononanoic acid | 0.57 ng/L | 10 ng/L |
| Gross Alpha | 0.8 pCi/L | 15 pCi/L |
| Nitrate | 0.26–0.32 mg/L | 10 mg/L |
| Uranium | 0.4 ug/L | 30 ug/L |
| Barium | 0.02 mg/L | 2 mg/L |
| Atrazine | 0.0095 ug/L | 3 ug/L |
| Chloride | 16 mg/L | — |
| Sulfate | 22 mg/L | — |
| Manganese | 0.3 mg/L | — |
| Nickel | 1.1 ug/L | — |
| Sodium | 8.3–8.7 mg/L | — |
| Zinc | 0.0018 mg/L | — |
| Perfluorobutanesulfonic acid | 0.32–0.57 ng/L | — |
| Perfluoroheptanoic acid | 0.86–1.5 ng/L | — |
| Perfluorohexanoic acid | 1.4 ng/L | — |
| Perfluoropentanesulfonic acid (PFPeS) | 0.55 ng/L | — |
| Perfluoropentanoic acid | 1.4–1.6 ng/L | — |
| PFBA | 1.7–1.9 ng/L | — |
| pH | 7.7 | — |
| Total Dissolved Solids | 170 mg/L | — |
What this report doesn't tell you
14 of the 27 contaminants a community water system normally reports do not appear anywhere in Green Bay, WI's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Where your water comes from · EPA SDWIS
Green Bay, WI's drinking water comes from ground water, drawn from 2 sources.
Source
- BF214
- BF215
Treatment
- BF214
- 4
Distribution
Also buys water from CENTRAL BROWN CO WATER AUTHORITY.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based15 violations on record · most recent Oct 2005resolved
- Treatment technique violationHealth-based2 violations on record · most recent Oct 2024resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗