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WaterSafeCheck

ZIP Code 74345 Water Quality Report

Grove, OK · Delaware County County

Safety Score
C

Water Safety Grade

Fair — Some compliance concerns

Health Violations

3

Total Violations

58

Lead Risk

N/A

Contaminants

2

⚠

Active Water Quality Issues Detected

EPA records show 21 unresolved violations. Contact Grove Municipal Services Authority for current status.

About Tap Water in ZIP Code 74345

Tap water in ZIP code 74345 (Grove, OK) receives a C grade (score: 62/100) based on EPA monitoring data. While the water from Grove Municipal Services Authority is treated and regulated, this area has a moderate violation history that residents should be aware of.

Water System

Grove Municipal Services Authority

EPA ID: OK1021614

Water Source

Surface Water

Population Served

7,311 residents

County

Delaware County County, Oklahoma

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Lead Levels in ZIP 74345

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 9.3 ppb — Below Action Level

The 90th percentile lead level in 74345 is 9.3 ppb, below the EPA action level of 15 ppb but above what many health experts consider ideal. The CDC and EPA both affirm there is no safe level of lead exposure for children. Families with young children or pregnant women should consider a certified NSF/ANSI 53 water filter, and request lead testing of their home's tap water.
Lead Level (90th percentile)
9.30 ppb (0.0093 mg/L)
Lead Exposure Risk Rating
Unknown
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Violation History

Past 5 years — EPA SDWIS data

Grove Municipal Services Authority has recorded 3 health-based violations in the past 5 years. Multiple health violations suggest recurring compliance challenges. Residents should request a copy of the annual Consumer Confidence Report to understand what contaminants were involved and what corrective actions were taken. 21 violations are currently unresolved — meaning the issue has not yet been formally corrected in EPA records. This is a serious concern that residents should follow up on with their water utility.

Total Violations (5 yr)
58
Health-Based Violations
3
Unresolved Violations
21
Boil Water Advisories
0
Compliance Risk
Critical

Regulatory compliance risk is rated Critical — the highest risk category. Grove Municipal Services Authority has an extensive history of unresolved violations and enforcement actions. Independent water testing is highly recommended.

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Contaminants Detected

Contaminants with health-based violations on record

EPA records identify 2 contaminants associated with health-based violations in ZIP code 74345: Stage 2 DBP Rule, E. coli. These contaminants exceeded the Maximum Contaminant Levels (MCLs) established by the EPA under the Safe Drinking Water Act at some point in the 5-year monitoring period. The presence of these violations does not necessarily mean water is currently unsafe — water systems are often required to increase monitoring and treatment when violations occur. Review the annual Consumer Confidence Report for the most current status.

Stage 2 DBP RuleE. coli

⚖ Enforcement Actions

10 enforcement actions have been issued against Grove Municipal Services Authority — a high number that reflects sustained compliance struggles. Enforcement actions escalate from administrative orders to financial penalties when utilities repeatedly fail to meet safe drinking water standards.
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Water Source & Environmental Factors

Surface Water

This system draws water from lakes, rivers, or reservoirs. Surface water is treated to remove sediment, microorganisms, and chemical contaminants before reaching taps.

Water Source Type
Surface Water
EPA Radon Zone

Moderate potential

Zone 2

EPA Radon Zone 2 — moderate radon potential. The EPA recommends testing your home regardless of zone designation.

🛡 What Should You Do? — ZIP 74345 Recommendations

  • ⚠ Use a certified NSF/ANSI 53 filter for drinking and cooking water if you have young children
  • ⚠ Never give unfiltered tap water to infants in formula — use certified bottled or filtered water
  • ⚠ Request a copy of the Consumer Confidence Report to see what was detected and when
  • ⚠ Call the EPA Safe Drinking Water Hotline: 1-800-426-4791

Frequently Asked Questions — ZIP 74345 Water Quality

Is tap water safe to drink in ZIP code 74345?+
Tap water in 74345 (Grove, OK) is treated and regulated, but has a grade of C due to past violations. For most healthy adults, treated tap water is generally safe. Families with infants, young children, or immunocompromised individuals may want to use a certified water filter as a precaution.
What is the lead level in 74345 tap water?+
The 90th percentile lead level in 74345 is 9.3 ppb (parts per billion). The EPA action level is 15 ppb. This is below the action level, but some health experts recommend a lead filter for families with young children.
Who provides tap water to 74345?+
Tap water in ZIP code 74345 is provided by Grove Municipal Services Authority (EPA ID: OK1021614). This system serves approximately 7,311 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 74345?+
ZIP code 74345 is served by surface water. Surface water systems draw from rivers, lakes, or reservoirs and must meet strict EPA treatment requirements including filtration and disinfection.
Does 74345 have any active water quality violations?+
Yes — there are currently 21 unresolved violations on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact Grove Municipal Services Authority for the latest update.
How do I get a copy of my water quality report for 74345?+
Your water utility — Grove Municipal Services Authority — is required by law to send you an annual Consumer Confidence Report (CCR) by July 1 each year. You can also request it directly from the utility or find it online by searching "Grove Municipal Services Authority Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 74345?+
The right filter depends on what contaminants are present. For lead, look for a filter certified to NSF/ANSI Standard 53. For chlorine byproducts (like THMs), NSF/ANSI 42 filters work well. For a broad range of contaminants including PFAS, look for NSF/ANSI 58 (reverse osmosis) systems. For ZIP code 74345, with detected contaminants including Stage 2 DBP Rule and E. coli, a multi-stage filter or reverse osmosis system is recommended.
Is 74345 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Given the detected lead level of 9.3 ppb in 74345, we recommend using a certified NSF/ANSI 53 water filter or certified bottled water for preparing infant formula. Always consult your pediatrician for guidance specific to your child's health.

Data Sources & Methodology

Water quality data for ZIP code 74345 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by Grove Municipal Services Authority. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →