Public water system · PA3390830
ActiveYoccos 100
At a glance
Yoccos 100 (PWSID PA3390830) is an active transient non-community water system in Lehigh County, Pennsylvania. It reports serving 125 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as under public/private ownership. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in April 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
125
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Yoccos 100 compare with other water systems in Lehigh County?
By EPA's size categories, Yoccos 100 is a very small system (500 people or fewer). Lehigh County has 197 active public water systems. Its population served is well below the county average of 1,486 people per system, and accounts for less than 0.1% of the 292,806 people reported by systems filed under the county. Across Pennsylvania, the 7,217 active systems average 1,741 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Yoccos 100 is about 13% below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Pennsylvania has 4,429 active transient non-community water systems, 61% of the state's 7,217 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,632 Pennsylvania systems (92%) list groundwater as their primary source.
Who owns and regulates Yoccos 100?
EPA lists Yoccos 100 as under public/private ownership. The PA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 19 of the 197 active systems in Lehigh County (9.6%) are also under public/private ownership.
Does Yoccos 100 have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in April 2016. The violations listed here began between December 1980 and April 2016. By type: 3 monitoring and reporting, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Nitrate (4 of them). EPA lists 3 as resolved and 2 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2016-04-01 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 1989-12-24 | Monitoring and reportingMonitoring, Check/Repeat/Confirmation · code 04 | Nitratecode 1040 | No | Resolved |
| 1989-12-24 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1983-12-24 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1980-12-23 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
All 5 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Yoccos 100: frequently asked questions
Who runs Yoccos 100?
Yoccos 100 (PWSID PA3390830) is a transient non-community water system under public/private ownership. It is regulated by the PA state drinking water program.
How many people does Yoccos 100 serve?
Yoccos 100 reports serving 125 people through 1 service connection in Lehigh County, Pennsylvania.
Where does Yoccos 100 get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Yoccos 100 have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in April 2016. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Yoccos 100's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in April 2016. For current results, consult EPA ECHO, or the PA state drinking water program.
Where can I find Yoccos 100's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Yoccos 100 is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Lehigh County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lca Allentown Division | Lehigh | 118,000 | Community | Surface water |
| Lca Wlsa Central Division | Lehigh | 47,693 | Community | Purchased surface water |
| Swt Main System | Lehigh | 14,500 | Community | Purchased surface water |
| Emmaus Borough Public Water | Lehigh | 14,000 | Community | Groundwater |
| Whitehall Twp Authority | Lehigh | 13,063 | Community | Groundwater |
| Salisbury Twp Water System | Lehigh | 8,522 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Yoccos 100, PWSID PA3390830, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/yoccos-100-pa3390830 (data as of October 1, 2026).