Water Quality in Lock Haven, PA: 15 Violations — Grade D
Grade D · Score 41/100 · 2 water systems · Updated 2026-05-03
Lock Haven's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Local water systems serving Lock Haven, PA carry 15 EPA violations on record in the federal compliance database — documented events spanning categories from maximum contaminant level exceedances to monitoring requirements tracked by the national Safe Drinking Water program.
Water Quality by ZIP Code in Lock Haven
Water quality varies across Lock Haven's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 17745 | D | 41 | 15 | 0 | View report → |
Water Quality Overview
Lock Haven, Pennsylvania receives a water quality grade of D with an overall score of 41 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 2 water systems serving Lock Haven have accumulated 15 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 10,025 people.
What Grade D Means
A grade of D indicates significant compliance issues. Lock Haven's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
The average 90th percentile lead level across Lock Haven water systems is 0.0010 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 75% of homes built before 1986, Lock Haven has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Radon Risk
Lock Haven is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Lock Haven
Lock Haven is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 10,025 people across 1 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Lock Haven. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Lock Haven
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Lock Haven Water Systems
The following contaminants have been detected or caused violations across Lock Haven's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 5 | 1 | No |
| Revised Total Coliform Rule | Microbiological | N/A | 2 | 1 | No |
| E. coli | Microbiological | N/A | 2 | 1 | No |
| Uranium | Radionuclides | 0.03 mg/L | 1 | 1 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 1 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Lock Haven. Recent actions:
| Date | Action Type |
|---|---|
| 2025-11-12 | State Informal Enforcement |
| 2025-11-12 | State Filed Judgment |
| 2025-11-04 | State Filed Judgment |
| 2025-11-04 | State Informal Enforcement |
| 2025-08-07 | State Informal Enforcement |
| 2025-08-07 | State Filed Judgment |
| 2025-05-14 | State Informal Enforcement |
| 2025-05-14 | State Filed Judgment |
| 2025-04-09 | State Informal Enforcement |
| 2025-04-09 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-11-12.
Lock Haven vs. Nearby Pennsylvania Cities
How Lock Haven's water quality compares to similar cities in Pennsylvania:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Lock Haven | D | 15 | 2 | 10,025 |
| Castanea | D | 0 | 1 | 10,000 |
| Mc Elhattan | D | 0 | 1 | 10,000 |
| Woolrich | D | 0 | 1 | 10,000 |
Common Questions About Lock Haven Water
These are the most common questions residents search for about water quality in Lock Haven, Pennsylvania:
Is Lock Haven water hard or soft? Water hardness varies by source. Lock Haven's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Lock Haven tap water? Lock Haven's water receives a grade of D (41/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Lock Haven? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Lock Haven vs. Pennsylvania Average
Understanding how Lock Haven compares to the broader Pennsylvania average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Lock Haven.
ZIP Codes in Lock Haven
Lock Haven spans 1 ZIP code. The ZIP with the lowest water quality score is 17745. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
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
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.