Waldwick Water Dept, NJ
Lead detected, under the action levels
Latest 90th-percentile lead: 4.8 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Waldwick Water Dept
Waldwick Water Dept serves about 10,208 people through 3,569 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Bergen County, New Jersey. EPA system ID: NJ0264001; phone on file: 201-652-5987. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2025 (4.52 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Waldwick Water Dept is 5.69 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4.8 ppb |
| 2025 | 4.52 ppb |
| 2025 | 4.03 ppb |
| 2024 | 5.4 ppb |
| 2021 | 3.05 ppb |
| 2018 | 5.69 ppb |
Against other New Jersey systems
Of the 605 New Jersey systems with a lead result, the median latest reading is 1 ppb; 5 are over 15 ppb right now and 52 have gone over at some point. Waldwick Water Dept's 4.8 ppb sits at the 90th percentile in New Jersey and the 90th nationally (higher means more lead).
Nearby utilities
19 other systems share Bergen County; 2 of them have a higher latest lead result than Waldwick Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ridgewood Water | 61,700 | 2.61 ppb |
| Fair Lawn Water Dept | 35,564 | 2.5 ppb |
| Garfield Water Department | 30,487 | 3.4 ppb |
| Mahwah Water Department | 26,777 | 4.38 ppb |
| Passaic Valley Wc Lodi Wd | 24,136 | 0.85 ppb |
| Lyndhurst Water Department | 22,000 | 0 (not detected) |
| Elmwood Park Water Dept | 20,374 | 0 (not detected) |
| Park Ridge Water Dept | 16,466 | 1.4 ppb |
| Pvwc-North Arlington | 15,392 | 1.13 ppb |
| Ramsey Water Dept | 15,207 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Waldwick, NJ may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Waldwick Water Dept whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.