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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
EPA records for RANDOLPH/HOLBROOK JOINT WATER BOARD • Updated October 2026
Grade A — based on EPA compliance records, lead testing and PFAS monitoring
RANDOLPH/HOLBROOK JOINT WATER BOARD has a clean recent record: no health-based violations in the last five years and no lead, PFAS or historical monitoring result that costs it more than a few points.
Yes — by EPA's records Randolph, MA tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
Yes — by EPA's records Randolph, MA tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
EPA's SDWIS extract has no Lead and Copper Rule 90th-percentile result on file for RANDOLPH/HOLBROOK JOINT WATER BOARD. Homes built before 1986 should test at the tap regardless.
RANDOLPH/HOLBROOK JOINT WATER BOARD has no UCMR5 PFAS results in EPA's dataset; systems serving under 3,300 people were only sampled if selected. Ask your utility whether it has tested for PFAS.
RANDOLPH/HOLBROOK JOINT WATER BOARD has 5 violations on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
RANDOLPH/HOLBROOK JOINT WATER BOARD reports surface water as its primary source and serves about 46,519 people (EPA PWSID MA4244001).
Not on the strength of EPA's data for RANDOLPH/HOLBROOK JOINT WATER BOARD. A filter still helps with taste and with lead from your own plumbing, which no city-level test can measure.
Compare filter options for your Randolph tap water
EPA data describes water leaving the plant — a certified mail-in lab test shows what reaches your own faucet, including lead from household plumbing.
See the filters matched to Randolph's EPA results → — which certification actually removes what was found here, and what it does not touch.
Unsure which contaminants to treat? Compare home kits and certified lab testing before buying.
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RANDOLPH/HOLBROOK JOINT WATER BOARD · SDWIS records since 2016 · 5-year window starts 2021-09-13
EPA records no health-based violations for this system in the last five years.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Monitoring, Turbidity (Enhanced SWTR)Interim Enhanced Surface Water Treatment Rule | Monitoring & reporting | 2021-03-01 → 2021-03-31 | Archived |
| Monitoring, Turbidity (Enhanced SWTR)Interim Enhanced Surface Water Treatment Rule | Monitoring & reporting | 2021-02-01 → 2021-02-28 | Archived |
| Monitoring, Turbidity (Enhanced SWTR)Interim Enhanced Surface Water Treatment Rule | Monitoring & reporting | 2021-01-01 → 2021-01-31 | Archived |
| Monitoring, Turbidity (Enhanced SWTR)Interim Enhanced Surface Water Treatment Rule | Monitoring & reporting | 2020-12-01 → 2020-12-31 | Archived |
| Monitoring, Turbidity (Enhanced SWTR)Interim Enhanced Surface Water Treatment Rule | Monitoring & reporting | 2020-11-01 → 2020-11-30 | Archived |
Source: ECHO SDWA bulk download (SDWA_VIOLATIONS_ENFORCEMENT.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-13)
EPA Lead and Copper Rule 90th-percentile results reported by RANDOLPH/HOLBROOK JOINT WATER BOARD
No Lead and Copper Rule 90th-percentile result is on file for RANDOLPH/HOLBROOK JOINT WATER BOARD in EPA's SDWIS extract. Your utility's annual Consumer Confidence Report should list its most recent lead sampling.
Source: EPA SDWIS Lead and Copper Rule samples
RANDOLPH/HOLBROOK JOINT WATER BOARD has no results in EPA's UCMR5 PFAS dataset (2023–2026). Systems serving fewer than 3,300 people were sampled only if selected, so this is a data gap, not a clean result. About PFAS →
EPA Six-Year Review 4 compliance samples for RANDOLPH/HOLBROOK JOINT WATER BOARD · finished water only · dated data, released 2024
These are the regulated-contaminant samples RANDOLPH/HOLBROOK JOINT WATER BOARD reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Total trihalomethanes (TTHM) is flagged below; the status column explains why. Treat this as history, not today's tap water.
| Contaminant | Samples | Average | Max | EPA limit | Status |
|---|---|---|---|---|---|
| Arsenic | 80 detects | 0 µg/L | ND | 10 µg/LMCL | Not detected |
| Nitrate (as N) | 87 detects | 0.133 mg/L | 0.2 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 80 detects | 0 mg/L | ND | 4 mg/LMCL | Not detected |
| Chromium (total) | 80 detects | 0 µg/L | ND | 100 µg/LMCL | Not detected |
| Total trihalomethanes (TTHM) | 20 | 41.64 µg/L | 99.2 µg/L | 80 µg/LMCL (LRAA) | 1 single sample over MCL; average within limit |
| Haloacetic acids (HAA5) | 20 | 17.9 µg/L | 33.3 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
| Copper (tap samples) | 51 detects | 4 µg/L | 20 µg/L | 1300 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
Averages count non-detects as zero. TTHM and HAA5 limits are locational running annual averages, so a single high sample is not a violation — we grade those on the average only. Lead and copper rows are individual tap samples and are shown for context; compliance (and our score) uses the 90th-percentile result above. LRAA = locational running annual average; ND = not detected.
Source: SYR4 Six-Year Review compliance monitoring data 2012–2019 (released 2024-03)
RANDOLPH/HOLBROOK JOINT WATER BOARD · 0 service lines inventoried · Q2 2026 snapshot
RANDOLPH/HOLBROOK JOINT WATER BOARD has not yet submitted a complete service line inventory to EPA, so the number of lead service lines in Randolph is not publicly known.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID MA4244001 · See all Massachusetts lead service lines. We may earn a commission from filters and test kits, at no extra cost to you.
Surface-water systems draw from rivers, lakes or reservoirs and must filter and disinfect, which is why disinfection byproducts (TTHM, HAA5) are the readings to watch.
How to test your tap water and the treatment options that actually fit Randolph homes
The most reliable way to know what is actually coming out of your tap is a certified mail-in lab test. City-wide EPA data (like the report above) reflects the water leaving the treatment plant, but contaminants such as lead and copper can be picked up from your own service line and household plumbing — so the water at your Randolph faucet can differ from the system average. A state-certified lab measures dozens of contaminants at once with results you can trust; you can also find one near you through the EPA's certified-lab list at epa.gov/dwlabcert. Hardware-store test strips are cheaper and instant, but they only screen for a few basics (chlorine, hardness, pH, and a rough lead pass/fail) and are far less accurate — treat them as a first look, not a diagnosis.
Match the treatment to what your test finds. Reverse osmosis (RO) removes the widest range of contaminants — lead, arsenic, nitrate, PFAS, and dissolved solids — which makes an under-sink reverse osmosis system the most thorough choice for Randolph households with heavy-metal or PFAS concerns. If your main issue is taste, odor, or chlorine, an activated carbon filter (pitcher, faucet, or under-sink) is simpler and cheaper and handles chlorine and many organic compounds well, though carbon alone does not remove arsenic, nitrate, or most PFAS. NSF-certified pitchers rated for lead reduction are the easiest way to start today while you decide on a permanent setup.
We may earn a commission from testing kits and filters purchased through these links, at no extra cost to you.
What Randolph residents measured at their own tap (ZIPs 02368). All reader results →
Reader submissions are unverified and shown separately from EPA data. They reflect one tap on one day, not the utility's compliance record.
No reader results for Randolph yet - yours would be the first. A hardness or TDS number from a $10 strip kit is enough to start the map.
Help build the first reader-sourced water map. Enter whatever your test strip, TDS pen or lab report shows - one number is enough.
Randolph ranks #1 of 48 graded Massachusetts cities.
Yes — by EPA's records Randolph, MA tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
EPA's SDWIS extract has no Lead and Copper Rule 90th-percentile result on file for RANDOLPH/HOLBROOK JOINT WATER BOARD. Homes built before 1986 should test at the tap regardless.
RANDOLPH/HOLBROOK JOINT WATER BOARD has no UCMR5 PFAS results in EPA's dataset; systems serving under 3,300 people were only sampled if selected. Ask your utility whether it has tested for PFAS.
RANDOLPH/HOLBROOK JOINT WATER BOARD has 5 violations on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
RANDOLPH/HOLBROOK JOINT WATER BOARD reports surface water as its primary source and serves about 46,519 people (EPA PWSID MA4244001).
Not on the strength of EPA's data for RANDOLPH/HOLBROOK JOINT WATER BOARD. A filter still helps with taste and with lead from your own plumbing, which no city-level test can measure.
Even with good water quality, a filter removes trace contaminants and improves taste.
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Tap water is one piece of the picture — our sister sites cover the rest for Randolph, MA.
County radon prediction and EPA zone for homes around Randolph.
Arsenic and nitrate risk for homes on a well instead of city water.
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