Drinking water quality
What's in Saint Paul, MN tap water
20 contaminants were measured in the Saint Paul, MN water system's most recent annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine | 2.56–3.11 mg/LRange | 4 mg/LMCL | Approaching the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5 | 16.1–43 ug/LRange | 60 ug/LMCL | Approaching the limit |
| TTHM | 28.1–52.3 ug/LRange | 80 ug/LMCL | Approaching the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Fluoride | 0.67–0.74 mg/LRange | 4 mg/LMCL | Within the limit |
| Nitrate | 0.08 mg/LReported Level | 10 mg/LMCL | Within the limit |
| Sulfate | 21.3Reported Level | 500MCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Copper | 0–0.18 mg/LRange | 90 mg/LAL | Within the limit |
| Lead | 0–23.2 ug/LRange | 90 ug/LAL | Within the limit |
| Sodium | 26.6Reported Level | 20MCL | At or above the limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Perfluorobutanesulfonic acid | 0–2.2Range | 100MCL | Within the limit |
| Perfluoroheptanoic acid | 0–1.5Range | None set | Detected — no federal limit |
| Perfluorohexanesulfonic acid | 0–1.9Range | 47MCL | Within the limit |
| Perfluorohexanoic acid | 0–2.2Range | 200MCL | Within the limit |
| Perfluorononanoic acid | 0–0.37Range | None set | Detected — no federal limit |
| Perfluoropentanoic acid | 0–2.9Range | None set | Detected — no federal limit |
| PFBA | 13.1–26Range | 7000MCL | Within the limit |
| PFOA | 0–2.8Range | 0.0079MCL | At or above the limit |
| PFOS | 0–1.8Range | 2.3MCL | Approaching the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TOC | 44–62Range | None set | Detected — no federal limit |
| Turbidity | 0.142 NTUMax Single | None set | Detected — no federal limit |
Every figure here is transcribed verbatim from Saint Paul, MN's annual Consumer Confidence Report, cross-checked by a second model, and approved by a person before publishing. Numbers are the utility's own — a water-quality report covers an entire service area, not a single address.