Rensselaer, MO Tap Water Quality 2026

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

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

Main Utility: Ralls County Pwsd 1 PWSID: MO2024499 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS was sampled but not enough times for a compliance determination.

Rensselaer earns a B for water quality

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

Lead: not detected

PFAS sampled, too few results to judge

9 violations since 2015, 8 health-based

No violations currently open

Rensselaer's lead level vs. all Missouri community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: Not detected — 0% of the federal action level

✓ Lower lead than % of Missouri utilities

Population Served

253

~2953 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

9 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

0% of EPA action level

Not detected

Action level: 15 ppb

Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
TTHM	MCL EXCEEDANCE	81.1 UG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	85 UG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	88 UG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	82 UG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	85.2 UG/L	0.080 mg/L	2020	Resolved
TTHM	MCL EXCEEDANCE	82 UG/L	0.080 mg/L	2020	Resolved
TTHM	MCL EXCEEDANCE	96.5 UG/L	0.080 mg/L	2020	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2017	Resolved
TTHM	MCL EXCEEDANCE	84 UG/L	0.080 mg/L	2017	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 8 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Ralls County Pwsd 1

PWSID MO2024499

Water source Groundwater — Drawn from wells — SDWIS source code GW

Population served 253

Service connections 2,953

Systems serving this area 1

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Rensselaer tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open.

Does Rensselaer water have PFAS? ▼

It was sampled, but no sampling point had enough results for a compliance determination.

Who supplies water to Rensselaer? ▼

Ralls County Pwsd 1 (PWSID MO2024499). Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2022-09-07. No significant deficiencies were recorded.

What Should Rensselaer Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

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

New London, Mo Tap Water Quality 2026 Ralls Center, Mo Tap Water Quality 2026 Ralls Saverton, Mo Tap Water Quality 2026 Ralls Perry, Mo Tap Water Quality 2026 Ralls