Serving Rhode Island & Southeastern Massachusetts
Warwick Water reports that, outside Potowomut, 100% of its water is purchased from Providence Water. The 2025 Warwick system reported TTHM at 70.8 ppb and HAA5 at 17.2 ppb, both below their federal maximum contaminant levels.
Potowomut is supplied through Kent County Water Authority, which blends purchased Providence Water with groundwater sources. The 2025 Potowomut table reported TTHM at 77 ppb and total RI-regulated PFAS at 20.2 ppt at a raw source sample before blending.
Warwick’s 2025 report listed lead below 1 ppb at the 90th percentile with 0 of 30 sites over the action level. That does not rule out a home-specific plumbing issue, which is why tap-specific concerns should be evaluated at the property.
Private-well homes follow a different testing path. RIDOH recommends certified laboratory testing and routine schedules for bacteria, nitrate/nitrite, metals, corrosivity, hardness and other contaminants; PFAS, arsenic and similar health concerns require certified lab analysis.
WARWICK WATER QUALITY & TREATMENT GUIDE
Warwick homes do not all receive the same source water. The City of Warwick’s 2025 Consumer Confidence Report says customers outside Potowomut receive water purchased from Providence Water, while Potowomut is supplied through Kent County Water Authority. That source difference is one reason AquaTrust starts with the property rather than assuming one treatment plan fits the entire city.
Most Warwick public-water customers receive Providence Water, but Potowomut is different. Warwick’s 2025 report states that water outside Potowomut is purchased from Providence Water and originates in the Scituate Reservoir watershed. Potowomut is supplied through Kent County Water Authority, which uses a blend of purchased Providence Water and groundwater sources.
That distinction matters when interpreting a utility report. The Warwick system reported TTHM at 70.8 ppb and HAA5 at 17.2 ppb in 2025. Potowomut’s table reported TTHM at 77 ppb and HAA5 at 15 ppb. These are system-level results, not measurements from an individual kitchen tap.
| Warwick water situation | Useful first step | Typical treatment question |
|---|---|---|
| Providence Water supply | Confirm symptoms and test the condition at the home | Chlorine taste/odor, hardness, sediment, drinking-water treatment |
| Potowomut / KCWA | Review the current KCWA/Warwick reporting and test the home | Taste/odor, hardness, PFAS lab testing, point-of-use treatment |
| Private well | Test the actual well and use certified lab analysis when health contaminants are a concern | Iron, manganese, sulfur odor, low pH, hardness, bacteria, arsenic or PFAS |
System results are useful context, but they cannot tell you exactly what is happening at one home. Warwick’s 2025 report lists lead below 1 ppb at the 90th percentile with 0 of 30 sampled sites above the action level. Potowomut’s report also lists a 20.2 ppt total for Rhode Island-regulated PFAS compounds at a raw source sample from Misnock Well 4 before blending.
A homeowner concerned about lead, PFAS, arsenic, bacteria or another health-related contaminant should use appropriate certified laboratory testing. AquaTrust’s free in-home screening is for common treatment conditions and does not replace certified laboratory analysis for health contaminants.
AquaTrust can help Warwick homeowners evaluate common public-water and private-well treatment concerns after the actual condition is identified. Confirmed hardness may support a water softener. Chlorine-related taste or odor and certain sediment concerns may fit whole-home filtration. A dedicated drinking-water faucet may be a candidate for reverse osmosis.
For private wells, testing may point toward iron and manganese treatment, sulfur treatment, low-pH correction, softening or other targeted equipment. The sequence matters, so AquaTrust starts with the water chemistry rather than a preset system.
The process starts with water source, symptoms, measurable conditions and homeowner goals. AquaTrust distinguishes between municipal and private-well water, screens appropriate field parameters, reviews utility data when relevant and recommends certified laboratory testing whenever the concern requires it.
Warwick homeowners can also browse the Water Quality Learning Center, review well-water testing and treatment, or see the broader AquaTrust service area.
Yes. AquaTrust serves Warwick and Potowomut as part of its Rhode Island service area, subject to scheduling availability. Service includes homes on public water as well as private wells. The first step is to identify the source and what the homeowner is seeing, smelling, tasting or trying to improve.
A properly sized softener can reduce hardness-related scale, spotting and mineral buildup. AquaTrust measures hardness before recommending capacity or regeneration settings.
Whole-home filtration can address specific concerns such as chlorine-related taste and odor, sediment or other aesthetic conditions when the media is selected for the actual water source.
Under-sink reverse osmosis provides point-of-use drinking-water treatment and can be paired with whole-home equipment when separate treatment goals make sense.
Private-well treatment may include neutralization, iron or manganese filtration, sulfur treatment, softening or other targeted equipment. The sequence depends on measured water chemistry.
Clear recommendations with no franchise-style pressure, locked-in rental plan, or hidden maintenance surprises.
Local water context is useful, but treatment decisions should follow the actual condition at the home. These pages connect common homeowner concerns to the right next step.
