F
31

Failing Water Quality

Locust Grove, OK 74352

Mayes County · Population served: 11,311 · Data updated March 2026

Water Systems Serving This Area

🏔
LOCUST GROVE
Surface water · Pop. 1,600
PWSID: OK1021668
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MAYES CO RWD # 9
Surface water · Pop. 2,578
PWSID: OK1021678
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MAYES CO RWD # 2
Surface water · Pop. 6,280
PWSID: OK3004608
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MAYES CO RWD # 7
Surface water · Pop. 538
PWSID: OK3004627
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CEDAR CREST COUNTRY CLUB
Surface water · Pop. 315
PWSID: OK3004636

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
10.1
15 ppb 1 ppb Warning

PFAS / Forever Chemicals

1 detected 1 above EPA limits
CompoundLevelEPA MCLHealth GuidelineStatus
PFOS17.7 ppt4 ppt4 pptExceeded

Violation History (Last 5 Years)

360Total (5yr)
7Health-Based
329Major

Water Quality Summary

Understanding Your Water in Locust Grove

Tap water quality in Locust Grove, Oklahoma (74352) receives an overall grade of F (Failing) with a score of 31 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 28 points below the Oklahoma state average of 59. Compared to the national average (75), this area scores significantly lower. The area is served by 5 water systems providing water to approximately 11,311 people, using surface water sources. Testing has found elevated levels of Lead that warrant attention. Notably, 1 PFAS compound exceeds EPA limits — a significant concern given the persistent nature of these chemicals. Over the past 5 years, water systems here have accumulated 360 violations, including 7 health-based violations.

Your Score 31/100 F
vs State 28 pts below Oklahoma avg (59)
vs National 44 pts below national avg (75)

What a Grade F Means

A score of 31/100 indicates serious water quality failures in Locust Grove, OK. The water system has significant violations, contaminant exceedances, or enforcement actions. Residents should strongly consider using a certified water filtration system for drinking and cooking water, requesting their utility's latest test results, and potentially having their water independently tested.

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.

Common Questions

Frequently Asked Questions

Tap water in Locust Grove, Oklahoma receives a grade of F (Failing) with a score of 31/100. This indicates significant water quality concerns based on violation history, contaminant levels, or enforcement actions. We recommend reviewing the specific contaminants detected below and considering a certified water filter.

ZIP code 74352 is served by 5 water systems using surface water sources, providing water to approximately 11,311 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.

Lead was detected at 10.1 ppb in Locust Grove, Oklahoma. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.

Yes — 1 PFAS compounds were detected in water serving Locust Grove, Oklahoma, and 1 exceeds EPA maximum contaminant levels. PFAS are persistent chemicals linked to cancer, immune system effects, and developmental issues. A reverse osmosis or activated carbon filter certified for PFAS removal is recommended.

Water systems serving Locust Grove, Oklahoma have received 360 violations in the last 5 years, including 7 health-based violations. 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, PFAS), residents in Locust Grove, Oklahoma should consider: Reverse osmosis (RO) system — most effective for PFAS, lead, and other contaminants. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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