Peatlands are effective landscape sinks for toxic metals and metalloids (TMMs) due to the adsorption affinity of peat. In Sudbury, Canada, pollution from historical smelting operations deposited ~12,000t of nickel/copper, impacting thousands of ha of peatlands and transformed them into landscape TMM stores with degraded vegetation and ecosystem functions. Decades of restoration/recovery have followed, but it is unknown if changes in pH and vegetation may remobilize stored TMMs. To understand how recovery impacts metal mobilization, hydrological and porewater chemical parameters were monitored along a well-studied peatland recovery and contamination gradient for three field seasons (May-November, 2023-2025). The gradient comprised peatlands with high contamination/low recovery, low contamination/high recovery, and moderate contamination/recovery based on peat TMM concentrations and Sphagnum moss cover. Porewater nickel and copper were highest at the highly contaminated site, which had higher pH values (~5.5) compared to the other sites (~4.0). Unlike nickel, which exhibited little seasonal variation, copper concentrations were elevated during spring and summer and declined in fall. Across all peatlands, copper and nickel concentrations were highest (~0.15-0.2 mg/L) in 2023 and lowest in 2025 (~0.05-0.1 mg/L). Higher Sphagnum cover decreased porewater pH, but the decreased pH did not necessarily promote metal mobility. Higher partitioning coefficients of iron and nickel at the low contaminated site relative to the high contamination site indicated that TMM adsorption was not reduced by decreased pH but may instead be dominated by organic matter interactions. TMM remobilization in contaminated peatlands seems limited during recovery despite vegetation and pH changes.