Millham Water Treatment Plant is located at 225 Boundary St, Marlborough, MA. This business specializes in Government and Other Organizations. Millham Water Treatment Plant is open Mon, 7am-4:05pm; Tue, 7am-4:05pm; Wed, 7am-4:05pm; Thu, 7am-4:05pm; Fri, 7am-4:05pm; Sat, Closed; Sun, Closed and accepts American Express, Cash Only, Mastercard, Personal Checks and Visa.