Autotrol Chromium-6 Filter

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Local Groundwater and Water Delivery in Middleborough

The public water system serving Middleborough draws from groundwater sources and distributes water to more than 6,200 connections, providing drinking water to roughly 15,350 residents. This supply is managed by the Middleborough Water Supply system recognized under EPA public water system records.

Purpose and Scope of the EPA’s UCMR3 Survey

The Unregulated Contaminant Monitoring Rule (UCMR3) survey by EPA measured chromium-6 levels in Middleborough’s public water system between early and late 2014. This nationwide survey aims to identify the presence and concentrations of contaminants not yet regulated by federal standards to inform potential future rules. It is important to note that these results represent system-wide measurements, not individual household tap water tests. To understand the water quality precisely at a particular home or well, direct testing of that water source is essential.

California’s 10 Microgram-per-Litre Standard and Its Background

California has set a public health benchmark for chromium-6 (also known as hexavalent chromium or chromium(VI)) at 10 micrograms per liter (µg/L, also parts per billion). This limit originated from studies suggesting potential health impacts at elevated levels. While this standard influences water treatment choices for concerned households, it is not a federal regulatory limit nor a requirement in Massachusetts. Middleborough’s recorded chromium-6 levels, measured up to a maximum of 0.22 µg/L, fall well below such a benchmark.

Evaluating Treatment Capacity for Your Household’s Water Demand

In considering technical solutions to manage chromium-6, it is critical to align treatment capacity with household water usage patterns. The documented technology employing Autotrol systems offers configurations designed to handle a home’s daily water volume efficiently. Proper sizing ensures effective management without unnecessary resource use. Estimating your household’s peak and average daily consumption helps match treatment units to your needs.

Additional Considerations for Commercial or Industrial Water Users

Unlike residential settings, commercial and industrial operators must address higher water volumes and may face regulatory compliance obligations related to chromium(VI). Their water treatment evaluations often include concerns about process integration, flow rates, and discharge limits. While this briefing focuses on households, these factors highlight the complexity for non-residential stakeholders.

Maintenance Expectations for the Autotrol Chromium-6 Filter Approach

The Autotrol Chromium-6 Filter technology ships ready to configure for home use. Its maintenance routine typically involves scheduled monitoring of treatment media and periodic renewal as guided by operational water quality and usage levels. Maintaining system performance helps ensure consistent management of chromium(VI) concentrations aligned with household demand.

Interpreting 'Detected,' 'Median,' and 'Range' in Local Sampling Records

The EPA UCMR3 data for Middleborough lists 34 chromium-6 measurements, with 32 detections above the reporting threshold of 0.03 µg/L, a median detection of 0.145 µg/L, and a highest recorded level of 0.22 µg/L. These numbers describe the distribution of measurements but do not indicate any violation or unsafe condition. A detection means that chromium(VI) was measured, nothing more. The median is the middle value of all detections, giving an idea of typical levels. The range shows the variability found across samples during the survey.

What Should Not Be Inferred from Area-Wide Chromium Data

It is essential that residents do not assume their individual water contains chromium-6 at the levels summarized here. Only direct testing of a given home’s water can provide that information. Additionally, detections in municipal water systems like Middleborough’s, which has no health-based violations on record, do not signify unsafe conditions or recommend immediate action without further evaluation. These data serve as a regional snapshot to inform and support water quality decisions rather than dictate them.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2014-09-25. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Middleborough Water Supply (MA4182000), MA: 69 results across 2 listed contaminants, 52 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L