Martinsville’s drinking-water path begins before the treatment plant

A lake with a public-service job

Beaver Creek Reservoir has two visible identities: a place for recreation and the primary raw-water supply for Martinsville. The city describes a 175-acre lake roughly two miles north of the city, with about 1.3 billion gallons of storage capacity.

A supplemental source is available through a pump station on Leatherwood Creek. Water from these sources still has a substantial journey before it reaches a kitchen tap.

The Water Resources Department’s description places reservoirs, treatment plants, finished-water storage and neighborhood pipes within one system. This is useful because a drinking-water supply cannot be understood from the treatment building alone.

Land affects the water arriving there; treatment changes it; storage and pipes carry it onward. A weakness or improvement at one stage belongs in the context of the others.

The source is exposed to the landscape

EPA calls water in rivers, reservoirs, streams, springs and aquifers source water when it supplies a public system or private well. Protecting those sources can reduce contamination risks and treatment costs.

The agency’s explanation, updated January 13, 2026, describes a multi-barrier approach: choose an appropriate source, protect it, treat it effectively and prevent deterioration during distribution.

That approach makes the land around a reservoir part of a drinking-water story. A source receives water influenced by natural minerals, wildlife and human activity.

Treatment provides essential controls, but preventing unwanted material from arriving reduces the burden on those controls. Source protection is therefore an operating concern as well as an environmental one.

The city’s own reservoir rules acknowledge this connection. The document was adopted in June 1956 and most recently revised in April 2024.

It places the reservoir and adjacent areas under the Water Resources Department and prohibits activities that would contaminate the water or harm the watershed. The rules prohibit swimming, wading and bathing, and restrict recreational boating and access.

These limits reflect the place’s role as a water supply alongside its recreational use.

Chemistry helps particles become removable

The city’s 2024 water-quality report describes treatment beginning with chlorine for disinfection and Delpac for coagulation and flocculation. Lime and caustic soda adjust pH and add calcium hardness.

Water then passes through sedimentation basins, where floc particles settle, before filtration. The 2025 report describes the same sequence.

Each operation addresses a particular part of the raw water’s condition.

Tiny suspended particles do not all settle quickly on their own. EPA’s treatment explanation describes coagulation and flocculation as ways to bring particles into larger clumps, or floc, which can then be separated by settling.

This is a physical change made possible by chemical treatment: material that was dispersed through water becomes easier to collect and remove.

Filtration follows that settling stage. It can remove particles that remain, including clay, silt and other material.

EPA explains that clarifying water also improves the effectiveness of disinfection. The sequence matters because the operations support one another.

Filtering and disinfecting are different jobs, even when both contribute to the condition of the water leaving the plant.

Disinfection continues beyond the gate

Martinsville’s treatment description says additional chlorine is applied before water leaves the plant to maintain a residual in the distribution system. It also identifies sodium hydroxide for pH adjustment and sodium hexametaphosphate to reduce pipe corrosion.

Treatment therefore anticipates the next stage of the water’s journey rather than ending its purpose at the building’s outlet.

This helps explain why drinking-water chemistry is not simply a contest to remove every added substance. Some additions are part of keeping water suitable through its route.

Their purpose and monitored amounts matter. At the same time, the city’s reports explain that chlorine can react with naturally occurring organic material to form disinfection byproducts.

Treatment has to manage microbial protection and those chemical outcomes together.

The city describes the Clearview Drive treatment plant as having a rated capacity of 7.5 million gallons a day and continuous operations. That capacity is a description of infrastructure, not a claim about how much water a household uses or how much raw-water storage remains on a given date.

The reservoir, plant and customer demand each operate on different quantities and time scales.

Delivery is another piece of infrastructure

Finished water enters a network that the city describes as approximately 120 miles of distribution mains, serving about 7,500 metered connections. Those mains, storage facilities and smaller service lines connect treatment with ordinary life.

Their condition affects the reliability of delivery and the environment the treated water encounters on the way to a home or business.

Martinsville’s service-line inventory page distinguishes the public distribution system from the customer’s pipe between the meter and home. It also explains why corrosion control and pH adjustment matter: materials in pipes and plumbing can contribute substances to water after treatment.

Knowing a service line’s material is therefore information about a later stage of the supply, rather than another test of the reservoir.

The page includes an unknown-material category as well as identified materials. An inventory describes what is known about infrastructure.

A water sample describes the water collected at a place and time. Both are useful, but they answer different scientific questions.

A whole supply contains structures, materials and changing water conditions, which is why monitoring and maintenance remain part of its everyday work.

The 2025 record contains more than one result

Martinsville’s latest linked annual report covers calendar year 2025. It reports no primary maximum-contaminant-level violations during that year and says disinfection-byproduct requirements were met.

It also records a coliform finding that required a Level 1 assessment. One assessment was completed, the likely source was identified and no corrective action was required according to the report.

The table associates a total-coliform finding with July 2025. This is useful detail: the annual account includes a detection and investigation alongside its compliance statements.

Coliform monitoring can indicate a potential pathway or problem that needs assessment. A system’s scientific work includes responding to such indicators, rather than treating every result as identical.

For Martinsville residents, the complete path connects the protected source, treatment sequence, distribution materials and monitoring record. EPA’s source-protection planning framework adds the longer view: define the contributing area, identify potential contamination sources and revise plans as conditions change.

Together, these functions explain how a reservoir becomes a public service. The annual report is a dated record of that work, while the physical system continues operating and changing beyond the year it covers.