A
96

US Water Score: A

Horace, ND 58047

Cass County · Population served: 3,658 · Data updated July 2026

Service-area evidence: EPA service-area records associate the listed system with this ZIP. Boundaries may still overlap or change.

Water Systems Serving This Area

🌊
CASS RURAL WATER DISTRICT-PHASE I
Groundwater · Pop. 3,658
PWSID: ND0901060
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HORACE CITY OF
Surface water · Pop. 1,641
PWSID: ND0900488
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HORSESHOE BEND
Groundwater · Pop. 110
PWSID: ND0900489
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RIVERDALE SUBDIVISION
Groundwater · Pop. 88
PWSID: ND0901365
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FRADETS ORCHARD WATER SYSTEM
Groundwater · Pop. 56
PWSID: ND0901410

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
8.8
15 ppb 1 ppb Warning
Copper
2376.0
1300 ppb 300 ppb

Violation History (Last 5 Years)

10Total (5yr)
1Health-Based
1Major

Water Quality Summary

Understanding Your Water in Horace

Tap water quality in Horace, North Dakota (58047) receives an overall grade of A (Lower record-based concern) with a score of 96 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is roughly in line with the North Dakota state average of 93. Compared to the national average (75), this area performs significantly better. The area is served by 6 water systems providing water to approximately 3,658 people, using groundwater and surface water sources. Testing has found elevated levels of Lead that warrant attention. Over the past 5 years, water systems here have accumulated 10 violations, including 1 health-based violations.

Your Score 96/100 A
vs State 3 pts above North Dakota avg (93)
vs National 21 pts above national avg (75)

What a Grade A Means

A score of 96/100 means public water-system records for Horace, ND show relatively few concerns in the US Water Score model. This is an internal score, not an EPA safety rating, and it does not guarantee conditions at any specific tap.

Groundwater: drawn from underground aquifers via wells
Surface water: sourced from rivers, lakes, or reservoirs

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

🔶

Copper in Your Water

Copper can leach into water from copper plumbing, especially in newer homes or when water is acidic.

Health Effects

Short-term exposure above 1,300 ppb can cause gastrointestinal distress. Long-term exposure may cause liver or kidney damage. People with Wilson's disease are especially vulnerable.

Common Sources

Copper pipes, fittings, and faucets are the most common source. Corrosive (low-pH) water accelerates copper leaching.

What You Can Do

If copper levels are elevated, flush pipes by running water for 15–30 seconds before use. Reverse osmosis and distillation systems effectively remove copper.

Common Questions

Frequently Asked Questions

Based on public water-system records, Horace, North Dakota receives an internal US Water Score grade of A (Lower record-based concern) with a score of 96/100. This indicates relatively few system-level concerns in our model, but it is not an EPA safety rating and does not guarantee tap conditions inside individual homes.

ZIP code 58047 is served by 6 water systems using groundwater, surface water sources, providing water to approximately 3,658 people. Multiple source types mean your water may come from a blend of surface and underground sources.

Lead was reported at 8.8 ppb in public-system records for Horace, North Dakota. This is below the currently applicable EPA action level of 15 ppb, but may be above more protective health guidance; EPA's future LCRI action level is 10 ppb. Household plumbing can materially change tap-level exposure, so consider certified filtration and individual tap testing, especially where children are present.

No PFAS ("forever chemicals") were detected in water systems serving Horace, North Dakota during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Horace, North Dakota have received 10 violations in the last 5 years, including 1 health-based violation. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead, copper), residents in Horace, North Dakota should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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