Public water system record
Northwestern Lancaster Co Auth
Serves an area of Lancaster County, PA · 2,968 people served
Federal records show no health-based violations and 8 monitoring/reporting issues for Northwestern Lancaster Co Auth in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 8
Key facts
- Northwestern Lancaster Co Auth draws water from 2 wells.
- Most recent formal enforcement: signed compliance agreement by Pennsylvania, April 2011.
- Record on file since 1991, with 12 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 74 unknown out of 744 service lines.
Check whether Northwestern Lancaster Co Auth serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2025 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Public Notice
OTHER
|
Dec 11, 2018 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2017 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
Full record since 1991
EPA's records for Northwestern Lancaster Co Auth go back to 1991. Before October 19, 2016 they list 12 health-based violations (10 resolved, 2 archived by EPA without a recorded fix) and 62 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 35 |
| 2000s | 6 | 17 |
| 2010 to October 18, 2016 | 4 | 10 |
| October 19, 2016 to 2019 | 0 | 4 |
| 2020s | 0 | 2 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began April 2011, Resolved.
Show all 12 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11.8 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Apr 1, 2011 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 10.85 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jan 1, 2011 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11.2 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Apr 1, 2010 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 10.9 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jan 1, 2010 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 10.7 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Jan 1, 2009 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 1, 2004 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 2003 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Oct 1, 1991 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1991 | Archived |
Enforcement actions
Pennsylvania regulators and EPA took 4 formal enforcement actions against Northwestern Lancaster Co Auth and issued 2 boil water orders between 1991 and 2011, filed as 8 records in EPA's data. The most recent was a signed compliance agreement in April 2011.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Apr 26, 2011 | Pennsylvania | Signed compliance agreement | 1 violation (1 health-based): Nitrate |
| Jul 29, 2010 | Pennsylvania | Signed compliance agreement | 6 violations (2 health-based): Nitrate, Public Notice |
| Apr 28, 2010 | Pennsylvania | Signed compliance agreement | 2 violations (2 health-based): Nitrate |
| Oct 21, 2008 | EPA | Compliance order (no penalty) | 1 violation: Stage 2 Disinfection Byproducts Rule |
| Dec 27, 1991 | Pennsylvania | Boil water order | 1 violation (1 health-based): Total Coliform |
| Oct 15, 1991 | Pennsylvania | Boil water order | 1 violation (1 health-based): Total Coliform |
Where the water comes from
Northwestern Lancaster Co Auth draws water from 2 wells. It also buys water from City of Lancaster. 1 smaller public system such as schools, businesses or campgrounds buys water from Northwestern Lancaster Co Auth.
Buys water from
- City of Lancaster Lancaster, PA
Annual water quality report
Northwestern Lancaster Co Auth must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Pennsylvania.
Certified drinking water labs by state EPA guidance for private wells