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Big Spring, MO Tap Water Quality 2026

Water quality report for Big Spring, MO — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Big Spring's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Montgomery Co Pwsd 1 PWSID: MO6024406 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.14 ppb, 14% of the action level and no violations are open. PFAS was sampled but not enough times for a compliance determination.

B

Big Spring earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 2.14 ppb — 14% of the federal action level
PFAS sampled, too few results to judge
9 violations since 2015, 1 health-based
No violations currently open
Big Spring's lead level vs. all Missouri community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.14 ppb — 14% of the federal action level
✓ Lower lead than 52% of Missouri utilities
Population Served
149
~1402 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
9 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
14% of EPA action level
2.14 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.14 ppb, 14% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Resolved
Public Notice OTHER — — 2024 Unaddressed
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2024 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Unaddressed
Revised Total Coliform Rule MONITORING FAILURE — — 2017 Resolved
Public Notice OTHER — — 2016 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

9 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Montgomery Co Pwsd 1
PWSID MO6024406
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 149
Service connections 1,402
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Big Spring tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.14 ppb, 14% of the action level.
Does Big Spring water have PFAS? ▼
It was sampled, but no sampling point had enough results for a compliance determination.
Who supplies water to Big Spring? ▼
Montgomery Co Pwsd 1 (PWSID MO6024406). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-05-29. Inspectors recorded 2 significant deficiencies.

What Should Big Spring Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Missouri

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