Lake Superior Public School District (MN): 2 Health Violations
13 ZIP codes · 10 water systems · 197,271 people served · Updated 2026-06-26
Data: EPA SDWIS, NCES Last verified: 2026-06-26
Why School Water Quality Matters
Children drink 2–4× more water per pound of body weight than adults, making them more vulnerable to contaminants. School water quality affects students for hours every weekday.
Water Quality Overview
The Lake Superior Public School District in Minnesota spans 13 ZIP codes served by 10 community water systems, providing water to approximately 197,271 people.
The average Home Safety Score across the district is C (65/100) — with the lowest-scoring area at 52/100 .
Water quality in this district falls in the bottom 58% nationally.
Why This Matters for Children
Children are more vulnerable to water contaminants than adults. The EPA and CDC identify these key risks:
- Lead exposure — Even low levels of lead can affect brain development, reduce IQ, and cause behavioral problems in children. There is no safe level of lead for children.
- PFAS ("forever chemicals") — Linked to immune system effects and developmental delays in children. Children drink more water relative to body weight than adults.
- Nitrate — Dangerous for infants (can cause "blue baby syndrome"). Agricultural areas often have elevated nitrate.
- Disinfection byproducts — Long-term exposure may increase cancer risk. School water fountains often have stagnant water that concentrates these compounds.
Lead Levels in the District
| Metric | Value | EPA Threshold |
|---|---|---|
| Average lead level (90th percentile) | 0.0072 mg/L | 0.015 mg/L |
| Highest lead level | 0.013 mg/L | 0.015 mg/L |
| ZIP codes exceeding EPA action level | 0 of 13 | — |
EPA Violation History
Contaminants of Concern
| Contaminant | Category | Violations | Health-Based | ZIPs Affected |
|---|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 3 | No | 2 |
| Fecal Coliform | Microbiological | 3 | No | 2 |
| Revised Total Coliform Rule | Microbiological | 3 | No | 3 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | Yes | 1 |
| Lead and Copper Rule | Treatment Technique | 1 | No | 1 |
| Consumer Confidence Report Rule | Reporting | 1 | No | 1 |
Radon Risk
Dominant radon zone: Zone 2 (Moderate risk)
Water Quality by ZIP Code
| ZIP Code | City | Safety Score | Violations | Health | Lead Level | Exceeds? |
|---|---|---|---|---|---|---|
| 55731 | Ely | B (78) | 5 | 2 | 0.005 mg/L | No |
| 55601 | Beaver Bay | D (52) | 4 | 0 | 0.013 mg/L | No |
| 55614 | Silver Bay | C (69) | 3 | 0 | — | — |
| 55616 | Two Harbors | B (81) | 1 | 0 | 0.006 mg/L | No |
| 55602 | Brimson | D (53) | 0 | 0 | — | — |
| 55603 | Finland | D (53) | 0 | 0 | — | — |
| 55607 | Isabella | D (53) | 0 | 0 | — | — |
| 55609 | Knife River | D (53) | 0 | 0 | — | — |
| 55750 | Hoyt Lakes | B (72) | 0 | 0 | — | — |
| 55763 | Makinen | D (53) | 0 | 0 | — | — |
| 55796 | Winton | B (83) | 0 | 0 | 0.003 mg/L | No |
| 55803 | Duluth | B (71) | 0 | 0 | 0.008 mg/L | No |
| 55804 | Duluth | B (76) | 0 | 0 | 0.008 mg/L | No |
What Parents Can Do
- Request lead testing at your child's school — The EPA's 3Ts program (Training, Testing, Taking Action) provides guidance for schools. Ask your school board about their water testing schedule.
- Review the Consumer Confidence Report (CCR) — Your water utility publishes this annually. It details all detected contaminants.
- Consider a water filter for your home — NSF/ANSI 53 or NSF/ANSI 58 (reverse osmosis) filters are certified to remove lead. This is especially important for infant formula preparation.
- Pack water from home — If you're concerned about school water quality, send your child with a water bottle filled at home (filtered if possible).
- Stay informed — Bookmark this page to check for updates on water quality in your school district.
Need help with school water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
Frequently Asked Questions
Is the water safe in Lake Superior Public School District schools?
Water systems serving Lake Superior Public School District have recorded 2 health-based violations in the past 5 years. While utilities are required to meet federal standards, individual school buildings may have older plumbing that can introduce contaminants. Parents should request lead testing results from their school.
Does Lake Superior Public School District test for lead in school water?
Federal law does not require schools to test for lead in drinking water (except in some states with specific mandates). The EPA's voluntary 3Ts program encourages testing. Contact your school district office to ask about their testing schedule and results.
What level of lead is safe for children?
There is no safe level of lead for children, according to the CDC. The EPA action level of 0.015 mg/L (15 ppb) triggers corrective action for water systems, but the American Academy of Pediatrics recommends that school water contain no more than 0.001 mg/L (1 ppb).
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- School districts: NCES EDGE Geographic Relationship Files
- Radon: EPA Map of Radon Zones
Updated daily.