Hollister, MO: 16 Violations — 73/100 (2026)
2 ZIP codes · 8 water systems · Updated 2026-06-03
Water utilities in Hollister have maintained a consistent compliance record over recent monitoring periods — the city's above-average grade in MO reflects low violation rates and no systemic health concerns flagged in current data.
How Hollister Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Hollister Residents
- Your city's water systems recorded 16 violations in the past 5 years.
- Average lead level: 0.001 mg/L.
- Estimated remediation: $1,650 per household.
- CDC health risk index: 14.64 — above typical levels.
Hollister's Water Providers
Water supply in Hollister, MO follows a divided structure: 3 utilities account for the largest share of residential service out of 8 total systems, each managing its own distribution network and EPA reporting. Because these systems operate independently, rate decisions and compliance outcomes are determined separately.
Overview
We track water quality and home safety data for 2 ZIP codes in Hollister, Missouri (population ~8,512), covering 8 community water systems serving approximately 32,834 people region-wide.
2 of 2 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Hollister: B (73/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Hollister water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0010 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 2 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | 12 | 2 |
| Contaminant 0700 | Other | 6 | 2 |
| Stage 2 DBP Rule | Treatment Technique | 3 | 2 |
| Lead and Copper Rule | Treatment Technique | 3 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 65672 | C | 8 | 0 | Hollister Public Water System |
| 65673 | B | 8 | 0 | Hollister Public Water System |
All ZIP Codes in Hollister
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Hollister Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Hollister's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Hollister
Property equity in Hollister runs well ahead of estimated remediation costs — a cost-to-value ratio that sits in the low tier, meaning documented water and safety issues here are the kind homeowners can plan to address without treating the expense as a significant budget event relative to what their homes are worth.
Remediation costs in Hollister are relatively low compared to home values. The $900–$2,800 estimated range is a small fraction of median property value. Home values are 2% below the Missouri average.
Hollister: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Hollister appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Hollister: Flood History & Water Damage Risk
Although Hollister's flood history doesn't reach high-severity thresholds, NFIP data documents 155 claims and FEMA maps place 50% of ZIP codes in designated flood zones — a combined profile that makes flood-related water quality considerations a reasonable planning baseline.
Hollister has a moderate flood history with 155 FEMA claims averaging $59,188 per payout. 50% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,650</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Hollister, MO