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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 AQUA NJ - HAMILTON SQUARE • Updated October 2026
Grade F — based on EPA compliance records, lead testing and PFAS monitoring
AQUA NJ - HAMILTON SQUARE has serious issues in EPA's records: repeated health-based violations, unresolved violations, PFAS above the federal limit or lead near the action level. We recommend filtering drinking water.
Hamilton Township, NJ tap water is legal to drink but grades F on EPA's records, mainly because of PFOA or PFOS measured at or above the 4 ppt federal limit in 2023–2025 EPA sampling. A certified filter matched to that finding is a reasonable precaution.
Hamilton Township, NJ tap water is legal to drink but grades F on EPA's records, mainly because of PFOA or PFOS measured at or above the 4 ppt federal limit in 2023–2025 EPA sampling. A certified filter matched to that finding is a reasonable precaution.
AQUA NJ - HAMILTON SQUARE's most recent Lead and Copper Rule result (2021-01-01 to 2023-12-31) was 0 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
Yes. EPA's UCMR5 sampling (2025-03-25 to 2025-09-03) detected PFHpA, PFHxA, PFHxS, PFOA, PFOS, PFPeA, with PFOA or PFOS at or above the 4 ppt federal MCL. Reverse osmosis and certified activated-carbon filters reduce PFAS.
AQUA NJ - HAMILTON SQUARE has 22 violations on file since 2016: 0 health-based in the last five years and 15 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
AQUA NJ - HAMILTON SQUARE reports purchased surface water as its primary source and serves about 39,128 people (EPA PWSID NJ1103001).
We recommend one. Reverse osmosis or a PFAS-certified carbon filter addresses the PFAS result.
Compare filter options for your Hamilton Township tap water
PFOA or PFOS was measured at or above EPA's 4 ppt limit in Hamilton Township's UCMR5 sampling.
See the filters matched to Hamilton Township'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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AQUA NJ - HAMILTON SQUARE · SDWIS records since 2016 · 5-year window starts 2021-10-16
EPA records no health-based violations for this system in the last five years. The 15 violations on file in that window are monitoring or reporting paperwork issues, not measured contaminant exceedances.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Water Quality Parameter M/RLead and Copper Rule | Monitoring & reporting | 2024-07-01 → 2024-12-31 | Archived |
| Monitoring, RegularGross Alpha, Excl. Radon and U | Monitoring & reporting | 2024-01-01 → 2024-03-31 | Archived |
| Monitoring, RegularRadium-226 | Monitoring & reporting | 2024-01-01 → 2024-03-31 | Archived |
| Monitoring, RegularCombined Radium (-226 and -228) | Monitoring & reporting | 2024-01-01 → 2024-03-31 | Archived |
| Monitoring, RegularRadium-228 | Monitoring & reporting | 2024-01-01 → 2024-03-31 | Archived |
| Monitoring, RegularCombined Uranium | Monitoring & reporting | 2024-01-01 → 2024-03-31 | Archived |
| Lead Consumer NoticeLead and Copper Rule | Monitoring & reporting | 2023-12-30 | Unaddressed |
| Monitoring, Source Water (GWR)E. COLI | Monitoring & reporting | 2023-10-03 | Unaddressed |
| Monitoring, RegularGross Alpha, Excl. Radon and U | Monitoring & reporting | 2023-07-01 → 2023-09-30 | Resolvedreturned 2023-09-30 |
| Monitoring, RegularCombined Uranium | Monitoring & reporting | 2023-07-01 → 2023-09-30 | Resolvedreturned 2023-09-30 |
| Water Quality Parameter M/RLead and Copper Rule | Monitoring & reporting | 2023-07-01 → 2023-12-31 | Archived |
| Monitoring, RegularCombined Radium (-226 and -228) | Monitoring & reporting | 2023-07-01 → 2023-09-30 | Resolvedreturned 2023-09-30 |
| Monitoring, RegularRadium-228 | Monitoring & reporting | 2023-07-01 → 2023-09-30 | Resolvedreturned 2023-09-30 |
| Monitoring, RegularRadium-226 | Monitoring & reporting | 2023-07-01 → 2023-09-30 | Resolvedreturned 2023-09-30 |
| Monitoring, RegularNitrate | Monitoring & reporting | 2023-01-01 → 2023-12-31 | Resolvedreturned 2023-12-31 |
| Water Quality Parameter M/RLead and Copper Rule | Monitoring & reporting | 2021-07-01 → 2021-12-31 | Resolvedreturned 2021-12-31 |
| Report Sample Result/Fail Monitor (RTCR)Revised Total Coliform Rule | Reporting | 2019-12-11 | Resolvedreturned 2019-12-30 |
| Water Quality Parameter M/RLead and Copper Rule | Monitoring & reporting | 2019-07-01 → 2019-12-31 | Resolvedreturned 2019-12-31 |
| Water Quality Parameter M/RLead and Copper Rule | Monitoring & reporting | 2019-01-01 → 2019-06-30 | Resolvedreturned 2019-06-30 |
| Monitoring, RegularCombined Uranium | Monitoring & reporting | 2016-10-01 → 2016-12-31 | Resolvedreturned 2016-10-12 |
| Monitoring, RegularCombined Radium (-226 and -228) | Monitoring & reporting | 2016-10-01 → 2016-12-31 | Resolvedreturned 2016-10-12 |
| Monitoring, RegularGross Alpha, Excl. Radon and U | Monitoring & reporting | 2016-10-01 → 2016-12-31 | Resolvedreturned 2016-10-12 |
Source: ECHO SDWA bulk download (SDWA_VIOLATIONS_ENFORCEMENT.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
EPA Lead and Copper Rule 90th-percentile results reported by AQUA NJ - HAMILTON SQUARE
Well below the 15 ppb action level. In the most recent monitoring period on file (2021-01-01 to 2023-12-31), 90% of the homes AQUA NJ - HAMILTON SQUARE sampled had lead at or below 0 ppb.
EPA's action level is 15 ppb (dropping to 10 ppb under the 2024 Lead and Copper Rule Improvements). There is no safe level of lead; the 90th-percentile figure describes the system, not your tap — homes with lead service lines or pre-1986 plumbing can be higher.
| Monitoring period | Lead 90th percentile | vs 15 ppb action level |
|---|---|---|
| 2021-01-01 → 2023-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2018-01-01 → 2020-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2015-01-01 → 2017-12-31 | 1.7 ppb | Well below the 15 ppb action level |
| 2012-01-01 → 2014-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2009-01-01 → 2011-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2006-01-01 → 2008-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2003-01-01 → 2005-12-31 | 4 ppb | Well below the 15 ppb action level |
| 2003-07-01 → 2003-12-31 | 3 ppb | Well below the 15 ppb action level |
| 2000-07-01 → 2000-12-31 | 2 ppb | Well below the 15 ppb action level |
| 1997-07-01 → 1997-12-31 | 3.8 ppb | Well below the 15 ppb action level |
| 1996-07-01 → 1996-12-31 | 2.1 ppb | Well below the 15 ppb action level |
| 1995-07-01 → 1995-12-31 | 4.9 ppb | Well below the 15 ppb action level |
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
EPA UCMR5 monitoring, 2025-03-25 to 2025-09-03 · 261 PFAS results at entry points to the distribution system
PFOA and PFOS and PFHxS measured at or above EPA's legal limit in at least one sample. Utilities have until 2029 (2031 under EPA's proposed extension) to comply with the 2024 PFAS rule, so a result above the MCL today is not yet a violation — but it is the number that matters for your health.
| Compound | Detects / samples | Max (ppt) | Reporting limit | EPA MCL |
|---|---|---|---|---|
| PFOA | 7 / 9 | 11.6 | 4 ppt | 4 ppt |
| PFOS | 6 / 9 | 11.4 | 4 ppt | 4 ppt |
| PFHxS | 4 / 9 | 10.4 | 3 ppt | 10 ppt |
| PFNA | 0 / 9 | < 4 | 4 ppt | 10 ppt |
| HFPO-DA | 0 / 9 | < 5 | 5 ppt | 10 ppt |
| PFBS | 0 / 9 | < 3 | 3 ppt | hazard index only |
| PFHpA | 4 / 9 | 3.4 | 3 ppt | hazard index only |
| PFHxA | 5 / 9 | 5.4 | 3 ppt | hazard index only |
| PFPeA | 5 / 9 | 4.6 | 3 ppt | hazard index only |
“< 4 ppt” means below the laboratory reporting limit, not zero. ppt = parts per trillion (ng/L). Results are for finished water leaving the treatment plant.
Lithium (also monitored under UCMR5, not a PFAS): detected in 2 of 9 samples, max 27.5 µg/L. There is no federal limit for lithium.
What PFAS are and how to remove them → · Best filters for PFAS →
Source: UCMR5 occurrence data, EPA Data Summary July 2026 (UCMR5_All.txt)
EPA Six-Year Review 4 compliance samples for AQUA NJ - HAMILTON SQUARE · finished water only · dated data, released 2024
These are the regulated-contaminant samples AQUA NJ - HAMILTON SQUARE reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Radium-226/228, Gross alpha are flagged below; the status column explains why. Treat this as history, not today's tap water.
| Contaminant | Samples | Average | Max | EPA limit | Status |
|---|---|---|---|---|---|
| Arsenic | 340 detects | 0 µg/L | ND | 10 µg/LMCL | Not detected |
| Nitrate (as N) | 4033 detects | 3.295 mg/L | 5.2 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 3634 detects | 0.653 mg/L | 1.4 mg/L | 4 mg/LMCL | Within MCL |
| Chromium (total) | 3418 detects | 1.353 µg/L | 4.3 µg/L | 100 µg/LMCL | Within MCL |
| Uranium (combined) | 3693 detects | 0.015 µg/L | 3.159 µg/L | 30 µg/LMCL | Within MCL |
| Radium-226/228 | 371215 detects | 1.304 pCi/L | 13.04 pCi/L | 5 pCi/LMCL | 11 of 371 samples over MCL |
| Gross alpha | 368215 detects | 3.397 pCi/L | 38.6 pCi/L | 15 pCi/LMCL | 6 of 368 samples over MCL |
| Total trihalomethanes (TTHM) | 136134 detects | 9.515 µg/L | 39.5 µg/L | 80 µg/LMCL (LRAA) | Within MCL |
| Haloacetic acids (HAA5) | 13292 detects | 1.666 µg/L | 16 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
| Lead (tap samples) | 657 detects | 0.892 µg/L | 23 µg/L | 15 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
| Copper (tap samples) | 9959 detects | 107.98 µg/L | 410 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)
A point-of-use (under-sink) system typically runs $200-$600 installed; whole-house treatment $1,000-$3,000+ depending on flow and what has to come out. Tell us where you are and a certified water-treatment installer serving Hamilton Township will follow up - no obligation.
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 Hamilton Township 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 Hamilton Township 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 Hamilton Township 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 Hamilton Township residents measured at their own tap. 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 Hamilton Township 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.
Hamilton Township ranks #132 of 155 graded New Jersey cities.
Deep-dive guides for the specific contaminants EPA data flagged in Hamilton Township's water, with removal options for each.
Hamilton Township, NJ tap water is legal to drink but grades F on EPA's records, mainly because of PFOA or PFOS measured at or above the 4 ppt federal limit in 2023–2025 EPA sampling. A certified filter matched to that finding is a reasonable precaution.
AQUA NJ - HAMILTON SQUARE's most recent Lead and Copper Rule result (2021-01-01 to 2023-12-31) was 0 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
Yes. EPA's UCMR5 sampling (2025-03-25 to 2025-09-03) detected PFHpA, PFHxA, PFHxS, PFOA, PFOS, PFPeA, with PFOA or PFOS at or above the 4 ppt federal MCL. Reverse osmosis and certified activated-carbon filters reduce PFAS.
AQUA NJ - HAMILTON SQUARE has 22 violations on file since 2016: 0 health-based in the last five years and 15 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
AQUA NJ - HAMILTON SQUARE reports purchased surface water as its primary source and serves about 39,128 people (EPA PWSID NJ1103001).
We recommend one. Reverse osmosis or a PFAS-certified carbon filter addresses the PFAS result.
PFOA or PFOS was measured at or above EPA's 4 ppt limit in Hamilton Township's UCMR5 sampling.
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Based on contaminants detected in your water, these resources may be helpful:
Find the right filter for your Hamilton Township water quality needs:
Understand your water better with our in-depth guides on contaminants, filtration, and water safety.