Public water system · NJ1326002
ActiveManalapan Twp - Knob Hill
At a glance
Manalapan Twp - Knob Hill (PWSID NJ1326002) is an active community water system in Monmouth County, New Jersey. It reports serving 8,700 people through 2,318 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
8,700
Service connections
2,318
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Manalapan Twp - Knob Hill compare with other water systems in Monmouth County?
By EPA's size categories, Manalapan Twp - Knob Hill is a medium system (3,301 to 10,000 people). Monmouth County has 288 active public water systems. Its population served is about 3.5 times the county average of 2,486 people per system, and accounts for 1.2% of the 715,906 people reported by systems filed under the county. Across New Jersey, the 3,496 active systems average 2,750 people each. Nationally, the average active community water system reports serving 6,703 people, so Manalapan Twp - Knob Hill is about 30% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. New Jersey has 582 active community water systems, 17% of the state's 3,496 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 128 New Jersey systems (3.7%) list purchased surface water as their primary source.
Who owns and regulates Manalapan Twp - Knob Hill?
EPA lists Manalapan Twp - Knob Hill as owned by a local government. The NJ state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 57 of the 288 active systems in Monmouth County (20%) are also owned by a local government.
Does Manalapan Twp - Knob Hill have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in July 2024. The violations listed here began between January 1996 and July 2024. By type: 3 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Chlorine, Consumer Confidence Rule, Total coliform bacteria (TCR) and Nitrate. EPA lists 3 as resolved and 1 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 |
|---|---|---|---|---|
| 2024-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Archived |
| 2011-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2006-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 4 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.
Manalapan Twp - Knob Hill: frequently asked questions
Who runs Manalapan Twp - Knob Hill?
Manalapan Twp - Knob Hill (PWSID NJ1326002) is a community water system owned by a local government. It is regulated by the NJ state drinking water program.
How many people does Manalapan Twp - Knob Hill serve?
Manalapan Twp - Knob Hill reports serving 8,700 people through 2,318 service connections in Monmouth County, New Jersey.
Where does Manalapan Twp - Knob Hill get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Manalapan Twp - Knob Hill have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in July 2024. 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 Manalapan Twp - Knob Hill'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 4 violations for this system; none is health-based, and the most recent began in July 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the NJ state drinking water program.
Where can I find Manalapan Twp - Knob Hill's water quality report?
As a community water system, Manalapan Twp - Knob Hill must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Monmouth County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Nj American Water - Coastal North | Monmouth + 1 more | 377,613 | Community | Surface water |
| Gordons Corner Water Co | Monmouth | 46,196 | Community | Purchased surface water |
| Freehold Twp Water Dept | Monmouth | 29,831 | Community | Purchased surface water |
| Marlboro Township Water Utility Division | Monmouth | 29,480 | Community | Purchased surface water |
| Wall Twp Water Dept | Monmouth | 26,000 | Community | Purchased surface water |
| Belmar Water Dept | Monmouth | 20,000 | 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, “Manalapan Twp - Knob Hill, PWSID NJ1326002, New Jersey”, https://aquacensus.com/water-systems/new-jersey/manalapan-twp-knob-hill-nj1326002 (data as of October 1, 2026).